Oninit® Archive
Results for “DS_MAX_SCANS”
Changing DBSPACETEMP run-time
Hi, IBM Informix Dynamic Server Version 11.70.FC5XE Please, is there a way to change DBSPACETEMP for a session inside 4GL? ------------------------------ Sincerely, Dennis ------------------------------…
flags (onstat -g ses)
That's the same set of flags as in ' onstat -u ' I'd say. For a session having multiple threads (PDQ), the 'P' thread would be the primary (sqlexec) one. ------------------------------ Andreas Legner ------------------------------…
ADO - activex data object
What do I require, to connect "ado activex data object" to Informix ? AIX 7.2 IBM Informix Dynamic Server Version 12.10.FC9W1 Regards Dirk…
PDQ mixed with OLTP
Hi, First of all good morning to all of the members just want to ask if anyone had done mixing PDQ with OLTP on their database? Our database is mostly OLTP with a batching process running every 12 MN of weekdays up until 3AM, I am wondering if I can use PDQ for the batching proc…
listener-thread@soc_be.c:3073: err = -25582:
Adding Version details Informix Version : IBM Informix Dynamic Server Version 12.10.FC6 O/S Version : Red Hat Enterprise Linux Server release 6.9 Thanks & Regards, Karthik Rajan…
Could not do a physical-order read to fetch next r
Hello Alexandre Thanks for your prompt response. Have you searched for any exclusive locks running on that mentioned table, before starting your java program? -- I didnt find any locks running. Pretty sure this is a highly accessed table on your OLTP, -- Yes, exactly. 117 colum…
Informix and speculative execution
Hi all, I have seen speculative execution patches for Firefox and SQL Server. Are there speculative execution patches for Informix in progress? There is no IBM Flash for Informix Dynamic Server and speculaative execution! Regards, David.…
DS_NONPDQ_QUERY_MEM not changing
SELECT * FROM sysmaster:syscfgtab WHERE cf_name = 'DS_NONPDQ_QUERY_MEM' Check the effective value. On Jan 4, 2018 5:32 PM, "R MICHAEL" <mboncalo@gmail.com> wrote: > Hi, and Happy New Year everybody > > I've tried to increase DS_NONPDQ_QUERY_MEM value because of CPU io wait > i…
Is PDQ only for DSS?
Hello all!! IBM's docs says "Parallel database query (PDQ) is a database server feature that can improve performance dramatically when the server processes queries that decision-support applications initiate." (source: https://www.ibm.com/support/knowledgecenter/SSGU8G_11.70.0/c…
Rovoke insert permission but still can insert
I am doing it at the command line in the server directly in the directory C:\\\\Program Files\\\\IBM\\\\IBM Informix Dynamic Server\\\\11.50\\\\bin…
Performance loss for a query after 11.50 >12.10 up
Thanks Cesar! unfortunately no functional index to remote queries involved here only 15 LEFT joins written the 'Oracle way' (just to help...) If I were the Informix optimizer, I would be lost in such a query *lol* Trying to find out where the engine is spending time...…
IO performance issues
Michael: FWIW, your other post (with onstat -g mgm) doesn't tell us anything useful except that the server's been online for 11 days and 18 hours or 282 hours. Assuming you have not zero'd your stats since startup, I can calculate a rough Buffer Turnover Rate (BTR) across the tw…
Compacting a dbspace through onunload and onload
For ALTER FRAGMENT ... it will be much faster if you drop any indexes, do the ALTER, then rebuild the indexes w/ PDQ (and appropriate settings). Otherwise we have to maintain the rowids in the index(es) as the data rows move to new pages. Mark Scranton The Mark Scranton Group ma…
12.10.FC6 Mac port released
IBM Informix 12.10.FC6 release for Mac OS is officially available! John F. Miller III STSM, Lead Architect miller3@us.ibm.com 503-747-1366 IBM Informix Dynamic Server (IDS)…
Fragmentation Fundamental Question
Did the same proof against a much larger table on AM getting 3 scan threads. Working on original test details. Even at 30M rows the table was very small. Wondering if that is why only 1 scan thread was allocated? Thanks - Mark…
opentable memory leak
Original post: No AUTOINDEX as far as I can tell. Turning off PDQ avoids the issue and I can live with this until permanent fix is found. Thanks, Andrew Response: It's a APAR in 12.10.xC5. APAR IT09544. The description talks about auto-index path, but the real trigger is an…
RSS/HDT Sec - Different Query Plans???
This took long enough but we have resolved this issue. DS_TOTAL_MEMORY was set WAY higher on the system with the poor query plan. We were not using PDQ but it affected this query anyway. IBM is putting a defect together to address the issue. thanx for all the replies, dan…
RE: moving database tables from one dbspace to ano
To add to Art's recommendations ... DS_TOTAL_MEMORY is a very important setting for maximizing use of PDQPRIORITY. It's the memory allocated for PDQ queries out of the virtual portion and guideline is 90% of SHMVIRTSIZE. The biggest benefactor of this is sort memory. Use SET EXPL…
IO Wait and PDQ
I have a session running against Informix 11.7 FC7 database. The SQL is running a join against 2 tables, each with 10 fragments a piece. 1 of these tables is stored under cooked chunks due to the sensitivity of contained data. The user specifies SET PDQPRIORITY 4 prior to startin…
RSS not working
-bash-4.2$ onstat - IBM Informix Dynamic Server Version 11.50.FC9 -- On-Line --…
Informix upgrade
Can we upgrade informix from Dynamic Server Version 11.70 to 12.1 workgroup edition directly?…
Optimising index builds
>> How are the tables fragmented? How much memory can PDQ 100% allocate? 1. Round-robin 2. I assume it is constrained by SHMVIRTSIZE, which is 24000000? Thx Neil…
when use IfxDataReader.GetIfxDateTime to NULL valu
Hello, The version of Informix products in my environment is: Database server: AIX IBM Informix Dynamic Server Version 10.00.FC5 IBM Informix CSDK Version 2.90 IBM-ESQL Version 2.90.FC4 Client: PC Windows IBM Informix-ESQL 3.70.TC5DE.…
Poorly Optimized SQL
Thanks David. I am ashamed to admit, but I am still a PDQ novice.…
Do not set the PSORT_NPROCS ?
Folks, I see the following rules on 11.70 info center. In rule 2: "Do not set the *PSORT_NPROCS* environment variable", What negative impacts it would cause if we set the *PSORT_NPROCS* in index creating process? Thanks, Frank http://pic.dhe.ibm.com/infocenter/idshelp/v117/in…
Performance Tuning Discussion
Ok it seems you have a big hardware, what´s your Informix version? What´s your box architecture? For performance tips, there is a good article in Andrew Ford´s blog, that should clarify your thoughts.... http://www.informix-dba.com/p/informix-innovator-c-tuning-basics.html This…
DB_locale or local naming convention
Hi, I already mention the informix version. IBM Informix Dynamic Server Version 11.70.TC1IE…
Physical log size
Art, Thanks for the info. We do have enough buffer cache to effectively buffer most of what will be active at any point, so it really does come down to monitoring the various checkpoint-related stats. It was just really confusing that the message indicated that it would be fas…
Error -556 on @ reference
In IDS_A have a stored procedure do_some that has a insert into a local table. In IDS_B have a stored procedure do_some that does: call base@IDS_A:do_some(); Calling this sp works ok. In IDS_C i try to run: call base@IDS_B:do_some(); Fails with error -556 Cannot create, drop,…
Using PDQPRIORITY to throttle certain queries
Hoping to get some opinions on this. We have a public website that is currently using our main production database (IDS 11.50.FC6). The main query used by the website uses a single table that typically has 50K to 100K rows. The query typically completes in 0.4 to 0.5 seconds. …
SET PDQPRIORITY in an IF...THEN block?
All: I have some SP code that has a SET PDQPRIORITY N directive inside an IF ... THEN block that checks the application configuration table to see whether PDQ is enabled. Can anyone (Art, ideally) confirm whether or not this will actually work to control PDQ and will NOT use PD…
Use of fragmentaion for tables
If you fragment a table, say by expression, I know that using PDQ will result in the use of parallel scan threads. If your application (it is a third party app) does NOT use PDQ, is it still "useful" (better performance) to fragment tables? Will parallel scans still occur, or wil…
Help about PDQ
Where I put the command set PDQ priority in the application 4gl Thanks Wanderlei…
Re: Configure IDS 11.50 to avoid sorts going d....
Search something smaller. Like the onconifg.std that came with the 11.50 engine you have installed. ( they group items and also give definitions and other information in the onconifg file itself ) You will find the proper spelling there I believe its something like one of these…
doubt about parameters (PDQ)
I need to know how to turn on and off the PDQ via application thank you very much Wanderlei - Intera Consultoria…
What are best onconfig parameters for a DSS app
Someone posted this answer in http://stackoverflow.com/questions/10477914/which-of-the-ids-11-70-onconfig-para meters-can-be-changed-to-maximize-performanc and your reply contradicts some of the following: "..But in essence, DS_MAX_QUERIES is the maxumum number of parallel que…
IDS 7.31 UD5 data(base) recovery
Informix Dynamic Server Version 7.31.UD5 I understood that IDS 7.31 entered End Of Support in September 2009 ( 2 and a half years ago) I hope this is not a business critical system…
Online Log full date/time stamp on entries & verbo
Good morning IIUG community, Is there a Logging Jedi-Master out there who can tell me how to change logging settings for Informix IDS 11.50.FC6? I'm looking to have the Online Log with full date/time stamp on log entries instead of just the Time. Example: 08:27:58 listener-thr…
enterprise replication time to replicate data
IBM Informix Dynamic Server Version 11.50.FC6 Question for enterpise experts Does anyone know a command that will give me time that it takes to replicate data to a node? for example i update on server a and it replicates to server b . How long did it take? cdr view profile gives …
Issue on IMPLICIT_PDQ + BOUND_IMPL_PDQ features
Hello my friends. (Informix 11.70.FC2 on a linux_64 machine) I had configured our PDQ features (since 11.50) like this (onstat -g mgm output): Memory Grant Manager (MGM) -------------------------- MAX_PDQPRIORITY: 80 DS_MAX_QUERIES: 40 DS_MAX_SCANS: 1048576 DS_NONPDQ_QUERY_MEM: …
why phantom pdq message in wee hours?
This involves running IDS 11.70.TC1IE on Windows 2008 Server os. I see this each morning at the same time in the ids log file: 01:11:01 Warning: PDQ functionality is not supported in IDS Innovator-C Edition. The value of PDQPRIORITY cannot be set to 10. It is reset to …
Over 1,000 days of 24x7 database uptime!
On 29.07.2011 20:38 Lester Knutsen wrote: > From one of our customers, their Informix server hit 1,000 days today > .... congratulations;) > > IBM Informix Dynamic Server Version 10.00.FC8 -- On-Line -- Up > 1000 days 00:31:45 -- They beat mine just bit ... IBM Informix D…
why does DS_NONPDQ_QUERY_MEM have the prefix "DS"
In Informix Administrator's Reference, I see: Use the DS_NONPDQ_QUERY_MEM configuration parameter to increase the amount of memory that is available for a query that is not a Parallel Database Query (PDQ). My questions are: Now that DS_NONPDQ_QUERY_MEM is for NONPDQ, why does it…
Setting up HDR- First Time -11.70 Innovator-C
Hi, I am setting up HDR for the first time. onstat - on primary shows IBM Informix Dynamic Server Version 11.70.UC2IE -- On-Line (Prim) -- Up 0:11:5s onstat - on secondry shows IBM Informix Dynamic Server Version 11.70.UC2IE -- Fast Recovery (Sec) -- Up 00s onstat -m on sec…
ISAM error 197: Partition recently appended to
Informix Dynamic Server Version 9.40.UC5 SUSE Linux Enterprise Server 10 (i586) I have done a level 0 backup directed to /dev/null and tried again. still it is throwing the same error.…
Tool to estimate the size of an index
Sorry, I forgot to provide the version of the installation: IBM Informix Dynamic Server Version 11.50.FC4 Operative System: AIX Version 6.1…
limit on query length in Informix IDS 11.50
Is there a limit on query length in Informix IDS 11.50? If there is one, can it be increased? Also can anyone suggest some information on how to optimize IDS 11.50 for longer queries to make them run faster? We have some Cognos reports that send very long queries to IDS 11.50 …
Config
BRIAN FOSTER wrote: > I am doing an intial tune for a new instance of 11.5 64bit. All of our > previous instances have been 32bit so I am unsure about my current shared > > memory config... do I have too many buffers? I am also wondering whether I can > safely add 1 or more CPU V…
functional index - create with parallel sort
Cesar, Are you using PDQ in which level? How are the Parallel Database Query (PDQ) Configuration Parameters in your instance? You should use PSORT_NPROCS and PDQ >1, actually. In my environment to create indexes in parallel I usually use PDQ Priority High, but the MAX_PDQPRIORI…
Memory Management
shorti wrote: > oh..also think around 300 threads connected to this database. Woo. Terrifying. :o) I've run bigger sites myself. ;o) -- Cheers, Obnoxio The Clown http://obotheclown.blogspot.com I will now proceed to pleasure myself with this fish. -- This message has been sc…
Query works fine in IDS 10 but crashes 11.5 engine
Jonathon wrote: I'd post what the optimizer has to say, but sadly it never gets that far. It prints out the last query right before this one (which completes successfully) and then the oninit process hangs and the optimizer information for the query in question never gets printed…
PDQ and Growth Edition
I'm doing an upgrade from 9.40 to 11.5. For reasons unrelated to the upgrade process I want to buiold a new 11.5 server and dbexport/dbimport from 9 to 11.5 This is taking much longer than I planned for because I'm using IDS 11.5 Growth Edition, which disables PDQ, so the index…
Can't access sysindexes remotely
Hi, We are using IBM Informix Dynamic Server Version 11.50.FC6 using Platform: SunOS 5.10 Generic_125100-09 sun4v sparc SUNW,Sun-Fire-T200 Thanks…
Re: ERROR 770 on IDS 11.50 FC6
Hi Omar, I've had the same error, only on version 10, the cause could be completely different in your case. Here the cause was a stored procedure created with PDQ > 0 set in the environment. When the stored proc was dropped and recreated with PDQ = 0, the problem disappeared. H…
Re: Query-Optimizer on HDR-Secondary
Hi folks, I talked to my informix-supporter: Rebuilding the hdr-mirror solved the problem. Regards Markus Bschorer "Markus Bschorer" <mb@worxbox.com> schrieb im Newsbeitrag news:4bd44874$0$6892$9b4e6d93@newsspool2.arcor-online.net... > Hi Art, > > thanks a lot for your answers…
Query-Optimizer on HDR-Secondary
IDS 11.5 FC4 Linux 64 Bit Hi everybody, it seems, that the IDS-Optimizer works different on primary and (hdr-)secondary servers, having identical IDS-Versions. Example: create table wbx_permission ( per_object_id char(20), per_client_id char(10), per_user_type i…
ids query optimizer.
As I understand it, most query optimizers are cost-based. Some can be influenced by hints like FIRST_ROWS(). Others are tailored for OLAP. Is it possible to know more detailed logic about how Informix IDS and SE's optimizers decide what's the best route for processing a query, ot…
Doubt in Update statistics, resolution and confide
Hi Celso, Just for better understand , what update exactly have the performance problem? med ,high or both? what values of resolution/confidence used? The PDQ make all differ with update statistics high, use more memory and they intend to use light scan and avoid the indexes...…
btscanner endless
Hi all, Does anyone knows why suddenly a btscanner becomes endless? I review which index is cleaning and it only has 783 records and it only has integer field. I added my btscanner reports below (as an observation, see big and negative numbers). I have done a drop a recreate o…
Performance - Sun SPARC T2
Hi Richard, Before, just to explain, this tests is to discover a "good" way to work with this kind of the machine and not tunning the "create index" ... My comments bellow - I keep this configuration because is my objective to use at production , where have a lot of others tab…
Informix Dynamic Server Software Downloads
It appears IBM has cleverly hidden the IDS downloads again on the Passport Advantage Website, at least from my prying eyes. I can find the Solid DB and the DB2 links just fine. Does anyone out there in IIUG-land with a Passport Advantage account know where IBM has stashed the dow…
RE: temporary dbspace usage
>I open pdq already. >set pdqpriority 100; >select ....; > >in the onconfig file >the parameters are setted >and ds total memory set 4G > >onstat -g mgm monitor the pdq use normally. Did you set environment PSORT_NPROCS? If not, try setting it to 3 or to 4. HTH, Paul M.…
temporary dbspace usage
I open pdq already. set pdqpriority 100; select ....; in the onconfig file the parameters are setted and ds total memory set 4G onstat -g mgm monitor the pdq use normally.…
Re: How to estimate query cost before execution
Turn PDQ on You can then limit the resources available to PDQ queries and even I think limit the number of PDQ queries that can run. This will mean that other queries and still run and your slow, complex queries will take even longer. I say bring back SCAFS!…
OPTCOMPIND and perl
Anyone know if I can change OPTCOMPIND after establishing a DB connection or does it need to be set before connecting? ta SLES10 SP1 IBM Informix Dynamic Server Version 10.00.UC5…
Re: help with sessid
emaus wrote: > Hi all: > > MAX_PDQPRIORITY 80 # Maximum allowed pdqpriority > DS_MAX_QUERIES 20 # Maximum number of decision support queries > DS_TOTAL_MEMORY 4000000 # Decision support memory (Kbytes) > DS_MAX_SCANS 1048576 # Maximum…
await_MC3 ??? How release a thread?
The issue is with the introduction of the new non-index column is the select clause is that you move from a key only scan to at best a key-first scan. If the optimizer believes the in clause will scan a large portion of the table then it probably will use a sequential scan. I wou…
configure vpclass on multicore systems (solaris)
GERARDO PADIERNA wrote: > Hi, > I have a doubt on what the optimal onconfig VPCLASS parameter should be on > multicore systems. For example, on a Sun M4000 server, with 4 physical CPUs > and 4 cores per CPU, when you issue an uname -X to get the number of CPUs, I > get: > lafeori…
Configuring IDS for multi-threaded processors
Neil Truby schrieb: > Has anyone views and experience on setting cpu vps for multi-threaded > chips? > One customer is running on IDS 10.0FC9 on Solaris 10 on a Sun server > with 16 quad-core, dual-thread, SPARC VII+ cpus. > Solaris "sees" this as 128 cpus. > > I suppose common o…
Formula for figuring out how many BTSCANNERS I nee
Was looking at my btscanners - IDS 11.5FC3 on Redhat linux. I see that it took 1379 seconds in cleaning and looks to be building a hot list is taking a while - As it is building now and the last one was built at 12:24 and it is 40 min later and still running. QUESTIONS: 1)Is th…
Informix Dynamic Server Scheduler question
Hi! I'm working on a project at my faculty. It's a java desktop application with an informix database. I have a problem using informix dynamic server scheduler. I have a particular table in my database. This table contains records that are inserted by the desktop aplication I'm …
IDS 9.40 End of Support Imminent
I have seen a number of posts on CDI recently related to IDS 9.40 As per the announcement on September 7th 2007, effective on the dates listed below, IBM will withdraw support from the following product releases licensed under the IBM International Program License Agreement: 9…
onstat -g iov
Neil Truby wrote: > No doubt the real answer is RTFM. But, can anyone give me or point me to a > good description of the i/o -wakeup ratio, and why 0.5 is "good"?: It's not "good" per se, it just means that you are doing less than 1 IO every time the IO thread gets fired up, wh…
Encryption in the engine?
Ian Michael Gumby wrote: > On Feb 6, 9:47 am, Obnoxio The Clown <obno...@serendipita.com> wrote: > >> I'm just fucking tired of reading every single thread you start: "Gumby >> is right, everyone else is wrong, look at me." >> >> Don't you have customers to bother, or are they si…
Are you still awake, Kate?
Captain Pedantic wrote: >> Have u seen anything re: db2 also > > Well, no. > > But nor am I contributing to a thread in which the central tenet is the > apparently incredible claim that DB2 is increasing the volume of its sales > despite zero marketing outside the existing custom…
fragmented table and pdq
In testing we want to play with testing of setting pdq to 5 across the board, we have always run pdq at - except when indexing or updating stats. What we found when pdq is set this sql does not stop at the first 5000 records. IDS is 11.5.FC3 Os is Solaris 10 set pdqpriority 5;…
Question about sysindexes.clust
Have you considered running PDQ with this process? -- Cheers, Obnoxio The Clown http://obotheclown.blogspot.com…
use stored proc that return multiple columns in a query
forgot to include version info: IBM Informix Dynamic Server Version 10.00.UC6W5 -- On-Line -- Up 207 days 22:14:39 -- 1441100 Kbytes…
installing informix dynamic server in linux
hi, I'm new to informix... I tried to install informix dynamic server(iif. 11.50.UC2E.Linux-RHEL4.tar) in my linux machine. I'm getting an error like this... One or more prerequisite system libraries are not installed on your computer. Install libpam.so.0, libncurses.so.5…
Meaning of DS_NONPDQ_QUERY_MEM
Dear All.... http://publib.boulder.ibm.com/infocenter/idshelp/v111/index.jsp I refered to this document of IDS 11.1 , and found the following statements: Use the DS_NONPDQ_QUERY_MEM configuration parameter to increase the amount of memory that is a available for a query that is…
Re: Please help optimize a query:
First cut: 1. Update statistics to the recommended levels (see the Performance Guide and John Miller III's white paper) 2. Save SET EXPLAIN output for this original query and all subsequent attempts to optimize it. 3. Why are you forcing the use of a particular index? Let th…
Please help optimize a query:
//QUERY IS AS FOLLOWS: select --+index (s ix_sr2) s.trandt ,sub_min as min ,s.s_class ,s.status ,s.active_dt ,s.exp_dt ,s.canc_dt from status_records s where s.canc_dt >= '08/04/2008' and s.canc_dt < '09/04/2008' and s.canc_dt = (select --+index(y ix_sr2) max(canc_dt)…
PDQ and HPL
I just performed an HPL unload an re-load ona fairly meaty table. It took about 3 hours to re-enabled the indexes. Although I set PDQPRIORITY in the session that started the onpload, it didn't use PDQ. I then dropped and re-created the indexes again, this time through dbaccess…
Informix Dynamic Server v 11.50 Developer's Edition
Does everyone know that the Informix Dynamic Server Developer's Edition v11.50 that you can download from the IIUG Web site (www.iiug.org) is NOT timebombed, is completely and fully functional (including HDR, MACH11, ER etc.). Do you know that the only limitations on this versio…
Informix Dynamic Server v 11.50 Developer's Edition
Does everyone know that the Informix Dynamic Server Developer's Edition v11.50 that you can download from the IIUG Web site (www.iiug.org) is NOT timebombed, is completely and fully functional (including HDR, MACH11, ER etc.). Do you know that the only limitations on this versio…
b-tree scanner tuning and expected behavior
here the outputs, and thanks for the references. Regards. juanclu1-[PROD]-(db1):~ $ onstat -C IBM Informix Dynamic Server Version 9.40.FC9 -- On-Line -- Up 5 days 21:33:27 -- 2015232 Kbytes Btree Cleaner Info BT scanner profile Information ============================== Active…
CONFIGURATION ONAUDIT-IBM Informix Dynamic Server
Hello, I need to configure onaudit and onshowaudit able to register for each of the consultations that are made to the database, either through dbaccess, ODBC or another application. I've been reviewing the IBM Informix Trusted Facility Guide, but I was not working. What param…
Informix external directives ?
Dirk Gunsthï¿œvel schrieb: > Hi, > > first you should be able to set the optimizer goal per session using > SET OPTIMIZATION FIRST_ROWS > > secondly how do you see that the optimizer hints (that is what you > mean, right?) are not used? Do you have any helpfull output? > > (I h…
How to use Informix Dynamic Server
I have installed trial version of "Informix IDS Dynamic Server Developer Edition 11.5 for Windows 2003, XP, Vista, 32bit Version 1150TC1DE". But i am new to informix. Can anyone explain how to use IDS in detail.…
Caching Data to Buffers
Regarding Update Stats - short answer It synchs meta data with your real data, providing the SQL optimizer with the best possible query plan(s). MM…
Create Index Mysteriously Slow at the End - IDS 11.10.UC2W2 - Red Hat EL5
"Andrew Ford" <aford@networkip.net> wrote in message news:mailman.1093.1210707144.20610.informix-list@iiug.org... > I'm running into some very strange high checkpoints and really poor > performance towards the end of an index build. Can anyone shed some light > on what could be …
Re: unkillable sid's
On Feb 29, 4:58 pm, Darren_Jac...@carmax.com wrote: > Here is the stack from the onmode -X: > > 17:51:37 Stack for thread: 309 sqlexec > > base: 0xc000000249ffd000 > len: 69632 > pc: 0x0000000000000000 > tos: 0xc000000249ffecd0 > state: running > vp: 3 > > ( 0) 0x4…
Re: long checkpoint duration
Oh never mind, I see it. BTSCANNER. :-)) Thanks again. ----- Original Message ----- Subject: Re: long checkpoint duration From: "Mark Jamison" >;majp51@yahoo.com> Date: Tue, February 12, 2008 15:32 Hi Floyd, Think of a leaf scan as if it were a sequential scan. Within that …
Re: long checkpoint duration
Thanks Mark, I'm glad it also can be done on the fly, but is there an onconfig parameter or environment variable for this function ? I will definitely give this parameter some tries. Floyd ----- Original Message ----- Subject: Re: long checkpoint duration From: "Mark Jamison"…
Re: long checkpoint duration
Hi Floyd, Think of a leaf scan as if it were a sequential scan. Within that context A range scan is an asynchronous bulk scan of pages from the Lowest page with potneitally deleted itesm to the Highest page of the same. So if you have a lot of bulk deletes or at least deletes t…
Re: long checkpoint duration
Thanks Mark. I find very little information in the manual about what rangesize does or is. The actual rangsize=num usage is not even documented. I would love to do trace checkpoint but I can't bounce my instance. ----- Original Message ----- Subject: Re: long checkpoint duratio…
Re: long checkpoint duration
Well, it is by no means a smoking gun, but eh number of leaf scans you are doing could result in some performance degradation. I would definitely sugest enabling range scanning, since it is more efficient. Quickest way to do this would be onmode -C rangesize 100 onmode -C stop …
Re: long checkpoint duration
onstat -C Btree Cleaner Info BT scanner profile Information ============================== Active Threads 1 Global Commands 0 Number of partition scans 5462 Main Block 0x07000002a1…
DW query tuning - explain on
OK - I've tried the queries with PDQ set to 0 & 5 in dbaccess, run times are almost exactly the same. One underlying question I have, does this version, of IDS 10.00.FC3X6 (non-XPS) Informix support star transformation?…
Informix thread working with a index
Hi Paulo, We actually do a pretty decent job discussing the btscanner threads in the documentation for IDS 11.10, however some of that is not valid for you version. Basically in your version, you have two methods by which to scan an index. Leaf scan, or Range Scan. By default …
how to reduce the PDQ ready queries
Hi, I use PDQ in my application, then use onstat -g mgm monitor the pdq state, Queries Average # Maximum # Total # -------------- --------------- --------- ------- Active 3.5 +- 4.4 18 172 Ready 14.5 +- 4.8 21 64 the ready queries always retain around 14, How can i reduce read…
connection issues
Hi all, we are having issues with connections not being released timeously from the database. We are running IDS 10 FC5 on an HP/UX box. Users connect to the database over ODBC or via the informix native drivers on to an onsoctpc connection to the database. We either run into…
What is IPA abbreviation ?
Hi all IBM INFORMIX DYNAMIC SERVER 10.00 PRODUCT RELEASE bug_number 168928 description WITH NON-DEFAULT PAGE SIZE AND ACTIVE IPA'S, TABLE LEVEL RESTORES FAIL product_code ONUTILS component_code ARCHECKR What is IPA ? Thanks…
Re: IDS Features - MAX_PDQPRIORITY
On Dec 27, 4:36 pm, Dave <In4Mix...@gmail.com> wrote: > Hello, > > Aside from fragment elimination, are there any other features that are > enabled by IDS that result from setting MAX_PDQPRIORITY to 1 (or > greater)?? > > Any help would be greatly appreciated. At PDQPRIORITY 1 o…
Migrating data between Informix Platforms without
I've had similar issues with Brio reports. One possible fix is to force the report generation to use PDQ. In this way, the BUFFERS are not flushed and you get to use lightscan buffers. I've been able to up the RA_THRESHOLD/RA_PAGES significantly with no ill effects to OLTP and im…
Has any Informix DBA had to do the following?
On Oct 29, 9:45 am, "Ian Michael Gumby" <im_gu...@hotmail.com> wrote: > Here's an interesting situation. > > Had a long running query that seemed to go no where. Like it got lost. > > Has anyone had that happen to them running IDS? > > I mean I had to literally file a help desk t…
Number of users
Robert Roussey(IT) wrote: > With NETTYPE? 2 threads x 45 connections each > > NETTYPE soctcp,2,45,NET > > I don't think so. The engine will allocate more listeners. -- This message has been scanned for viruses and dangerous content by OpenProtect(http://www.openprotect.com), an…
Trouble with update statistics
We had/have some trouble with update statistics here. Because it's not so simple to describe in short I send the whole story: - IDS 9.40.FC4W2 - Solaris 5.9 Generic_117171-12 sun4u sparc SUNW,Netra-T12 - Table contains about 800,000,000 rows - Fragmented by expression 20 fragme…
4gl/esql syntax
On Wed, 2007-08-08 at 13:35 -0400, sergio kapul wrote: > looking for correct syntax to create directives inside > queries to overwrite optimizer query execution plan, > to be used in 4gl/esql, I got something that works in straight sql, but it's > ignored when I put it inside of …
Re: Res: long checkpoints on informix
On Jul 17, 3:43 pm, Cesar Inacio Martins <cesar_inacio_mart...@yahoo.com.br> wrote: > Hi Sakura, > > I wrote a shell to monitor my checkpoints and discover what dbspace/chunk is take more time. > > Copy the code below into a file on your unix , execute a chmod 700 and execut…
Re: Res: long checkpoints on informix
On 17 jul, 15:43, Cesar Inacio Martins <cesar_inacio_mart...@yahoo.com.br> wrote: > Hi Sakura, > > I wrote a shell to monitor my checkpoints and discover what dbspace/chunk is take more time. > > Copy the code below into a file on your unix , execute a chmod 700 and execute …
Re: Res: long checkpoints on informix
On 17 jul, 15:43, Cesar Inacio Martins <cesar_inacio_mart...@yahoo.com.br> wrote: > Hi Sakura, > > I wrote a shell to monitor my checkpoints and discover what dbspace/chunk is take more time. > > Copy the code below into a file on your unix , execute a chmod 700 and execute …
Res: long checkpoints on informix
Hi Sakura, I wrote a shell to monitor my checkpoints and discover what dbspace/chunk is take more time. Copy the code below into a file on your unix , execute a chmod 700 and execute with informix... when occur a checkpoint , it will display to you the dbspaces/chunks wher…
Re: long checkpoints on informix
On 16 jul, 06:34, Ben Thompson <b...@nomonitorsoftspam.com> wrote: > Sakura.g...@gmail.com wrote: > > hi everyone > > i recently start to have some long and constant checkpoint > > i did lot of change but cant reduce it > > i have Informix Dynamic Server Version 9.40.FC2 > > and …
Re: long checkpoints on informix
On 16 jul, 06:34, Ben Thompson <b...@nomonitorsoftspam.com> wrote: > Sakura.g...@gmail.com wrote: > > hi everyone > > i recently start to have some long and constant checkpoint > > i did lot of change but cant reduce it > > i have Informix Dynamic Server Version 9.40.FC2 > > and …
long checkpoints on informix
Please post the output from: onstat -m onstat -d onstat -D onstat -u onstat -g iov Sakura.ggxx@gmail.com said: > hi everyone > i recently start to have some long and constant checkpoint > i did lot of change but cant reduce it > i have Informix Dynamic Server Version 9.40.FC2 >…
IIUG TV
Great job on the video work!! I look forward to seeing more! -t- -- -- Informix Dynamic Server Database Engine -- http://www.informix.com --…
IDS Optimizer Query Plan, declaring and naming indexes
I'm seeing differences in performance for the same SQL being executed on two slightly different databases. Using Set Explain, the difference is when database1 exectues part of the WHERE, it goes down the Index Path for that particular table and it's fast. On database2, the query …
Re: admin tools like PC client
Mike, What version of Informix are you using? Informix SE? Informix OnLine? Informix Dynamic Server? Most Informix versions these days come with a product call I-Connect that needs to be installed on the PC and rovides the Informix ODBC drivers.…
Error when initializing
06:36:20 IBM Informix Dynamic Server Version [b]10.00.UC6TL[\\b] I believe this is likelt ot be a new ish instance to a newish user of the software…
query execution plan
As Jack Parker mentioned earlier, there may not be any problem, optimizer just choosing query path based on number of rows. If you are seeing performance problem with one plan versus other, may consider using optimizer directive to enforce the correct path. -Sanjit Chakraborty…
Question on SHMVIRTSIZE
On 08/05/07, Mary Gregory <mary.gregory@rheem.com> wrote: > I still haven't found a good way to determine whether or not adding more > virtual memory to the instance would speed up queries or not. I think I > might try to add another 128 MB just to see what happens. Also, I am > …
Re: index build performance
Very cool. Thanks Art. And thanks Clown. ======================== -<<Floyd Wellershaus>>- Database Administrator Unix Administrator email: fwellers@yahoo.com Home: 703-430-0805 Cell: 703-477-6045 ======================== http://www.one.org/ -…
Re: index build performance
Thanks. Yes the table has 6 fragments. I have 7 cpu's on the box. So I assume, based on your recommendation to set PSORT_NPROCS to 7 and have 7 temp dbspaces and set PSORT_DBTEMP to those. btw, we have nothing else running at the time, so I was planning on using pdqpriority 100 b…
Re: index build performance
Floyd Wellershaus said: > Back on that 1.1 billion row table again. > Thanks to help from sources here, I was able to get the named pipes > working to half the time for a load and unload for the table. > Now I'm concerned with building the indexes. > >>From sources here also, I a…
index build performance
Back on that 1.1 billion row table again. Thanks to help from sources here, I was able to get the named pipes working to half the time for a load and unload for the table. Now I'm concerned with building the indexes. From sources here also, I am going to bounce the server and us…
Re: Informix Marketing Brainstorming Forum
TBP wrote: > Although a Single CPU VP does limit many (all?) of the PDQ / > fragmentation side of things. I'm not sure that it does. You can still get fragment elimination and you can still run queries with multiple threads. Regards, Ben.…
problems with Informix dynamic server 9.4 @ WIndows 2003
I have problems with connecting the server. I use correct user/password to connect to the server, but the server do not known the server. I'm sure the user exist and is one of the user in Informix_Admin group. I have installed Informix dynamic server 9.4 in a windows xp system in…
IDS 9.49 UC2 -> UC7 PDQ changes?
Schuran, Sven said: > Hi, > > We changed from UC2 to UC7 on a Linux box with 2.4 kernel. > > With the same configuration, UC7 runs out of memory, but I don't know why. > > PDQ is enabled. When I disable PDQ everything works fine. > One thing, the working sessions nearly all have …
Re: -211 file not open
I wanted to post back an important note on how this issue was resolved for us. If we turned off the PDQ (Parallel Database Query) option we no longer received a -211 SQLCODE with -101 ISAM. Don't know why this is the case. Is there perhaps a defect in the engine in how it tracks …
Re: Pls help to tune my informix engine .. thanks
Henry wrote: > Hi gurus: > > I am using IBM Informix Dynamic Server Version 9.40.FC7 under a 6 CPUs > HP-UX server. > There are 57 dbspaces with a total of 85 chunks. > The informix engine is running very slow recently. > I was not sure whether it is the result of poor tuning or …
Re: query optimize
Devaraj Takhellambam said: > Thanks for replying...The query has been working well and takes just about > 20-30 minutes in the past but recently it has been degraded and took about > 3-4 hours and sometimes 5 hour..so i thought it needs to be > optimized....Thanks.. OK, so how a…
query optimize
Hi, How can I optimize the informix query below- the query uses an OUTER join... select col1, col2, '' col3, col4, A.col5, A.col6, count(*) cout from table A, table B, table C, OUTER table D where A.col9 = B.col9 and A.col7 = D.col7 and A.col8 = 'Y' and …
Pls help to tune my informix engine .. thanks
what happened?? reloading data??? update statistics??? define slow. and also supply how busy your disks and cpus are. > bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans > 66194052 2043 3691556477 0 0 13524 49590653 > 34601364 seq sca…
Re: BTSCANNER defaults
10.0.UC5 here. Thanks for the info, what you say makes sense. The threads were very active and probably dynamically changed themselves to run at a high priority. We are upgrading our last 9.3 instances to 10.0 tonight and I am explicitly setting the BTSCANNER onconfig paramete…
Re: BTSCANNER defaults
Sorry for the repeat I forgot to include the whole list Inlater versions of 10, 10.00.FC5 and greater I believe, the Default is still LOW, but now it will actually switch to High to run any critical sections, like compresses. It will reset back to LOW when doing scans, or while …
Checkpoint taking more time
Hi Im having IDS 7.31 in HP-UX 4440 . Im having a problem with checkpoint taking lot of time when certain processes are running.rest of the time its taking 0 seconds. But sometimes its tabing 8,9,10 seconds How i can reduce the time taken for CKPT. I read that LRU writes should …
Re: IIUG Board Nominations - "Where's the Board?"
Christine Normile said: > Since this thread is still on topic.... > > I thought the initials on the goat were PW. What did I miss? Or > dare I ask? I'm equally confused. I prefer sheep. I mean, er... -- Bye now, Obnoxio "... no bill is required as no value was provided." --…
Re: DB Sapces....
Hi you, - onbar can backup and restore dbspaces - several scan threads should support your parallelism on your SAN disks (PDQ and fragmentation) - different dbspaces might have different page-sizes ( cache buffer pools ). You might create an 8kb pagesize dbspace for index data a…
PDQ on a single processor system
Hi, can sombody tell me if I can benefit from PDQ on single processor system ? According Informix performance guide, multiple treads are started when when PDQ is used, but can i benefit from this wif one physical processor is available only ? I am afraid the extra work to manag…
onstat -u and IDS maximum concurrent sessions
"maximum concurrent" gets reset with an onstat -z -----Original Message----- From: SANJIT CHAKRABORTY [mailto:c_sanjit@lycos.com] Sent: 26 October 2006 15:03 To: ids@iiug.org Subject: Re: RE: onstat -u and IDS maximum concurrent s.... [7679] The 'maximum concurrent' in the last…
Informix dbimport blob data slow
> I don't think dbimport uses PDQ so you might want to consider using the > myimport utility available from the IIUG repository which loads in > parallel. I don't think this is exactly the same as PDQ but it may help > speed things up. I think it does for import builds. However…
listener-thread: err = -25573
Errno 13 is "Permission denied" looks like an unauthorized user tried to connect to the database's port. Perhaps a port-scan attack? Art S. Kagel ----- Original Message ----- From: Mike Slupinski <ids@iiug.org> At: 10/13 9:33:43 IDS 10.00.FC4 Solaris 10 New server, New Databas…
Re: SAN and dbspace layout.
And don't forget that one day you might like to use PDQ - fragmented tables across multiple dbspaces. Think multiple LUN's, HBA's and how you route your switches if you ever go down this path.…
License Extension
Help.. I need a license extension for the IBM Informix Dynamic Server Version 10.00.FC3R1TL which I downloaded to do a evaluation. How can I get the license extened..my project is in the final stages .. Dhaya Commercial bank…
query using cpu
Floyd Wellershaus wrote: > Any idea why a query that does a join of a table on itself, doing a count and a group by, would cause the cpu usage to go drastically up, almost instantly ? Not pdq, just a query, on a non fragged table. > > It is doing multiple sequential scans of the…
Re: Security Vulnerabilities Addressed in Informix Dynamic Server
Clive Eisen wrote: > Ian Michael Gumby wrote: > > Yes the buffer overflow issues are a pain and frankly they shouldn't occur > > if IBM did formal code reviews. Or rather they should be caught and > > corrected prior to release. > > > > "Paul Watson" <paul@oninit.com> wrote in m…
How to tell if an Index is being used or not?
There are thread on c.d.i about tables with lot of sequential scans, and how to identify that tables (Querys, etc.) I think one may say that if a table are hit by lot of sequetial scans then performance goes down and it may be that an index is not used on that table or that it l…
Security Vulnerabilities Addressed in Informix Dynamic Server
Not sure if this has posted here or not but .... http://www-1.ibm.com/support/docview.wss?rs=630&context=SSGU8G&dc=D600&u id=swg21242921&loc=en_US&cs=UTF-8&lang=en Cheers Paul Paul Watson Tel: +44 1414161772 Mob: +44 7818003457 Web: www.oninit.com GO FURTHER with DB2 GET THER…
IDS 10.0 performance on RedHat
> These are based on multipe runs of a dbimport, and of populating a single > large-ish table then building a couple of indexes thereon, utilising PDQ, > thereafter. how many table fragments? why use dbimport and not HPL or similar to load the table? With dbimport you are likel…
Re: Checking indexes after large deletes
John, This would be a great topic for a "Chat with the lab". Thanks Kernoal John Miller wrote: > > BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 > > Here is what this paramater means: > > num= the number of btree scanner threads to start when the engine starts …
RE: Checking indexes after large deletes
> BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 Here is what this paramater means: num= the number of btree scanner threads to start when the engine starts up priority= low | high low means run the btree scanner below a normal user thread and only give the btr…
Performance issue after 732 to 94fc6 upgrade
See below: > ----- Original Message ----- > From: Doug Fossmeyer <ids@iiug.org> > At: 6/12 20:13:55 > > > Part 2 of posting > > onstat -c > > IBM Informix Dynamic Server Version 9.40.FC6 -- On-Line -- Up 2 days > 19:54:35 > -- 2325280 Kbytes > <SNIP> > TBLSPACE_STATS 0 # Maintai…
Getting ISAM error 116 during update statistics
Thanks for all your support this problem is solved by increasing the shared memory value in that server :-) On 5/26/06, ART KAGEL, .... <kagel@bloomberg.net> wrote: > > > Increase DS_TOTAL_MEMORY from the default and increase SHMVIRTSIZE to > accomodate > the extra memory. Also …
Poor view performance
Hi Paul. See other thread on IFX_FOLDVIEW. Cheers, Doug "Paul Watson" <paul@oninit.com> wrote in message news:064501c67f53$ad3bd330$0201a8c0@Arnold... > Solaris 2.8 IDS 10.0.FC4 > > Simple view joining two tables (4M and 25M rows). One is the live > table, the other the archi…
Initialising Informix
I am trying to initialize informix on a new server and I am getting this error. The server is HP UX 11.11 and Informix IDS 7.31 What could be the problem / This action will initialize Informix Dynamic Server; any existing Informix Dynamic Server databases will NOT be accessible …
Informix Connection From WIN CE.NET Emulator?
How do I connect to informix dynamic server from WIN CE.NET Emulator? Is there a WIN CE informix driver?…
IDS - Running temp dbspaces on RAMDISK
Another try could be to increase DS_NONPDQ_QUERY_MEM significatntly: Must be >= 128 and <= 0.25 * DS_TOTAL_MEMORY DS_NONPDQ_QUERY_MEM 65536 # Non PDQ query memory (Kbytes) $ onmode -wm DS_NONPDQ_QUERY_MEM=65536 (IDS 10) Could decrease IO into temp spaces.…
Re: Table Editor for Multiplatforms
Enhancements in Version 4.3 ..... also supports the Informix Dynamic Server 9.x. http://www.ibm.com/software/data/db2imstools/db2tools/db2te/…
dostats
Is there a way to have dostats update specific procedures? I would like to set PDQ on several, but not all. Thanks…
update statistics
> ----- Original Message ----- > From: Sergios.Zag.... <ids@iiug.org> > At: 2/17 3:12 > > Hi, Hello. > There are 4 tmpdb spaces defined > > onconfig statement > DBSPACETEMP tmpdbs1:tmpdbs2:tmpdbs3:tmpdbs4 OK, so 4GB of tempdbspace... > onstat -d output: > ....................…
Fragmentation Elimination Problem
I am on version IBM Informix Dynamic Server Version 10.00.FC4.…
Re: Informix Dynamic Server 9.30 - Shared Memory
Ronald Schwingel wrote: > Can someone please tell me how much Shared Memory (gigabytes?) > Informix Dynamic Server 9.30 (32-bit version) for AIX 5L can use > before asserting with a Shared Memory access error? Can you provide > documentation that I can pass on also? It looked to…
RE: Informix Dynamic Server 9.30 - Shared Memory
First off you shouldn't be getting shared memory access errors. That sounds more like a bug that technical support should address. I wouldn't be surprised if your getting can't allocate additional shared memory segment messages. Informix 32-bit on AIX is a bitch. The problem …
Informix Dynamic Server 9.30 - Shared Memory
Can someone please tell me how much Shared Memory (gigabytes?) Informix Dynamic Server 9.30 (32-bit version) for AIX 5L can use before asserting with a Shared Memory access error? Can you provide documentation that I can pass on also? We are looking at providing one of cust…
create a DB on Linux
Hi! I have installed Informix dynamic server on Linux. Now I want to create a data base. What should I do? Thanks…
Re: flagship sunk
Funny I have been able to download IDS 10 for Solaris, Windows and Linux am I just smarter than everyone else? www.informix.com Support and downloads In the middle trials and betas Oh look Informix Dynamic Server (IDS) V10.0 easy!…
Light Scans Notes
Greetings All, We're doing some performance tuning on an XPS 8.50.FC2 server on an AIX platform and I saw the output below when I ran "onstat -g scn." Can anyone provide some feedback on what the "Forward row lookup, Must copy," notes mean? Is this indicating something detri…
Posting from the Informix-list
Greetings All, We're doing some performance tuning on an XPS 8.50.FC2 server on an AIX platform and I saw the output below when I ran "onstat -g scn." Can anyone provide some feedback on what the "Forward row lookup, Must copy," notes mean? Is this indicating something detrime…
Optimizing a BaaN installation
> Query sysmaster:syscfgtab (sysmaster:sysconfig is a view that hides undocumented paramaters)! 64 DD_HASHSIZE 1 31 31 65 DD_HASHMAX 1 10 10 95 DS_HASHSIZE 1 31 31 96 DS_POOLSIZE 1 127 127 111 DS_MAX_QUERIES 0 1 1 -1 112 DS_TOTAL_MEMORY 0 2048 2048 -1 113 DS_MAX_SCANS 0 1048…
Re: IDS 10 - documentation questions
Oops! I mean IBM Informix Dynamic Server Version 10.00.TC3ET Althought the release notes (idse_win_release_notes_10.0.html) start with:- "Release Notes for IBM Informix Dynamic Server Express Edition for Windows Platforms 10.00.TC3E, 1 July 2005 " so it is TC3E or TCE3T? and …
Re: Sql to concatenate multiple rows to a single row / column
Thank you SaltTan - it works beautifully. BTW, we have IBM Informix Dynamic Server Version 9.40.FC6.…
Re: IFX_FLAT_UCSQ
>> I am sure flattening of uncorrolated subqueries (all, some types? don't know!) is off by default. This is not correct. I am sure that any query can be flattened if the cost says to do it that way. Also read the excellent link that Bill Dare included: http://www.iiug.org/waiug…
OPTCOMPIND
I set to to 0. I have seen loads of questions on here in the past about upgrading to IDS and finding everything running slowly. It appears that sometimes even though 2 should mean least cost the optimizer gets it wrong and will not use indexes. Setting OPTCOMPIND to 0 avoids th…
New IDS Forum on IBM Developerworks website
This forum provides a place for Informix Dynamic Server developers and users to share their questions, thoughts, and ideas with others. http://www-128.ibm.com/developerworks/forums/dw_forum.jsp?forum=548&cat=19…
Re: IDS 10 Express Edition
Note 10.00.xC3 = Enterprise Version 10.00.xC3E = Express Edition http://publib.boulder.ibm.com/infocenter/ids9help/index.jsp?topic=/com.ibm.relnotes.doc/uc3E/idse_win_release_notes_10.0.html Then click on "IBM Informix Dynamic Server Express Edition" in the right pane:…
setup Informix Dynamic Server Version 9.40.UC1E1 to linux error
I setup Informix Dynamic Server Version 9.40.UC1E1 to linux execcute oninit -ivy is failed the online.log is write /// 16:31:32 Dynamically allocated new virtual shared memory segment (size 8192KB) 16:31:32 Informix Dynamic Server Version 9.40.UC1E1 Software Serial Number AA…
ONCONFIG comments
Comments embedded. If somebody told me to change my $ONCONFIG, I'd take it with a large grain of salt and check up on every parameter they suggested I modify. I'd then make the changes one at a time and see how each one worked differently. Looks like an OLTP instance. Also look…
RE: strange behavior in 9.40.FC6
Hey, thanks. That fixed it. When I upgraded I ran "dostats -h $DBSERVER -d $DATABASE -p -P 10". That -P 10 was causing the problem. I'm not sure where my head was at when I decided to do that. Shot myself in the foot with that one. I've been floundering around with this pro…
strange behavior in 9.40.FC6
Did you run update statistics with pdpqriority set?? also for your spl??? afaikr if you run update stats for procedure/function xxx and have pdqpriority set then the spl will get it 'compiled in' so next time you run it it will use pdq. you could try to run set pdqpriority 0; …
Cost Estimation for queries
Again optimizer considering BUFFERS/RA_PAGES while considering estimated no of I/Os is not a good idea since buffers are part of volatile memory where at a point of time we cannot be sure how many pages reside in memory satisfying the query for which optimizer is evaluating the b…
RE: rule of thumb or words of wisdom for btree cleaners?
Just put BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 in Your $ONCONFIG - and Your desperation will go away -Alexey > -----Original Message----- > From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On > Behalf Of Michael Mueller > > Perha…
RE: rule of thumb or words of wisdom for btree cleaners?
Just put BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 in Your $ONCONFIG - and Your desperation will go away -Alexey > -----Original Message----- > From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On > Behalf Of Michael Mueller > > Perha…
RE: rule of thumb or words of wisdom for btree cleaners?
Forgot to mention, the the same settings can be done with the following $ONCONFIG parameter: BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 -Alexey > -----Original Message----- > From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On > Behal…
RE: rule of thumb or words of wisdom for btree cleaners?
Forgot to mention, the the same settings can be done with the following $ONCONFIG parameter: BTSCANNER num=1,priority=low,threshold=50000,rangesize=10000 -Alexey > -----Original Message----- > From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On > Behal…
rule of thumb or words of wisdon for btree cleaners?
Does anyone have a rule of thumb or words of wisdom regarding additonal btree cleaners? Looking at the output below it seems I could benefit from adding an additional cleaner or more. Stats reset at 8:30 AM or 6 hrs ago. HPUX 11 $ onstat -C IBM Informix Dynamic Server Version 9…
RE: rule of thumb or words of wisdom for btree cleaners?
Norma, After a thorough investigation of how the BTSCANNER works, I can suggest a rule of a thumb: 1. ALWAYS change btscanner from the default 'leaf scan' to 'range scan' with a range scan threshold equal to 1-5 % of Informix cache, like: onmode -C rangesize 10000 2. ALWAYS i…
RE: rule of thumb or words of wisdom for btree cleaners?
Norma, After a thorough investigation of how the BTSCANNER works, I can suggest a rule of a thumb: 1. ALWAYS change btscanner from the default 'leaf scan' to 'range scan' with a range scan threshold equal to 1-5 % of Informix cache, like: onmode -C rangesize 10000 2. ALWAYS i…
Re: rule of thumb or words of wisdom for btree cleaners?
Perhaps I should call this "words of desperation". Sorry for being negative. But the most striking thing your numbers show is how much i/o the btree cleaner wastes. NormaJean wrote: > All, > Does anyone have a rule of thumb or words of wisdom regarding additonal > btree cleaners…
Re: rule of thumb or words of wisdom for btree cleaners?
Perhaps I should call this "words of desperation". Sorry for being negative. But the most striking thing your numbers show is how much i/o the btree cleaner wastes. NormaJean wrote: > All, > Does anyone have a rule of thumb or words of wisdom regarding additonal > btree cleaners…
Re: rule of thumb or words of wisdom for btree cleaners?
http://www.informix.co.uk/btscanner.htm "NormaJean" <normajean.sebastian@tellabs.com> wrote in message news:S8%Vd.6$Jo6.2119@news.uswest.net... > All, > Does anyone have a rule of thumb or words of wisdom regarding additonal > btree cleaners? > Looking at the output below it see…
Re: rule of thumb or words of wisdom for btree cleaners?
http://www.informix.co.uk/btscanner.htm "NormaJean" <normajean.sebastian@tellabs.com> wrote in message news:S8%Vd.6$Jo6.2119@news.uswest.net... > All, > Does anyone have a rule of thumb or words of wisdom regarding additonal > btree cleaners? > Looking at the output below it see…
rule of thumb or words of wisdom for btree cleaners?
All, Does anyone have a rule of thumb or words of wisdom regarding additonal btree cleaners? Looking at the output below it seems I could benefit from adding an additional cleaner Stats reset at 8:30 AM HPUX 11 $ onstat -C IBM Informix Dynamic Server Version 9.40.FC2W4 -- On-…
rule of thumb or words of wisdom for btree cleaners?
All, Does anyone have a rule of thumb or words of wisdom regarding additonal btree cleaners? Looking at the output below it seems I could benefit from adding an additional cleaner Stats reset at 8:30 AM HPUX 11 $ onstat -C IBM Informix Dynamic Server Version 9.40.FC2W4 -- On-…
Join threads
Hi all, When i set PDQ priority on the session and run a query involving joins on table,how can i know whether the server is using the parallel join strategy or not. what is the utility to monitor the parallel joins. Bye.…
Re: purpose of optcompind and optgoal
calyanram@hotmail.com wrote: > Hi > > what is purpose of these two parameters ? > > regards > s.kalyan I'll answer since I was one of the users pressing for something like OPT_GOAL to be implemented back in the 7.24 days. OPT_GOAL tells the optimizer whether to optimize for the…
Re: very high "mt yield 0" on IDS 9.40
"rvb" <rvbon@gmx.de> wrote in message news:6e9a0040.0503030106.178fac00@posting.google.com... > looking at the wait statistics of my IDS 9.40 I find an ever > increasing value for the "MT yield 0" condition. > > Up to my knowledge this means that threads are doing busy waits for …
purpose of optcompind and optgoal
calyanram@hotmail.com wrote: > Hi > > what is purpose of these two parameters ? > > regards > s.kalyan I'll answer since I was one of the users pressing for something like OPT_GOAL to be implemented back in the 7.24 days. OPT_GOAL tells the optimizer whether to optimize for the…
very high "mt yield 0" on IDS 9.40
"rvb" <rvbon@gmx.de> wrote in message news:6e9a0040.0503030106.178fac00@posting.google.com... > looking at the wait statistics of my IDS 9.40 I find an ever > increasing value for the "MT yield 0" condition. > > Up to my knowledge this means that threads are doing busy waits for …
Informix Dynamic Server information Centre
Great new utility just posted under IDS 10 on the docs site has uses for other products and versions than just IDS 10 so take a look even if you are not using 10 yet!! http://publib.boulder.ibm.com/infocenter/ids9help/index.jsp…
Cannot find message file. Check INFORMIXDIR and DBLANG.
im trying to run the oninit -i in the command prompt when the message appear... we installed... IBM Informix Dynamic Server 9.40 IBM INFORMIX-4GL Rapid Development System Version 7.32.UC2 IBM INFORMIX-4GL Version 7.32.UC2 set up sqlhosts, services, onconfig, path... but when tr…
=?iso-8859-1?Q?RE=3A_7=2E31UD8_improve_=CAch_writes_=5B4250=5D_?=
I suppose (from your Informix server name), that You are on RS/6000. Do You have KAIO configured? Please, make 'onstat -g iob' dump. If KAIO works, 2 AIO VP's should be enough. Do You RAID (what type?) or dumb drives? You have rather long checkpoints (12 seconds). Can You make '…
question about pdq memory
If you have a certain amount of memory configured in the DS_TOTAL_MEMORY parameter in onconfig, does that mean your engine reserves that memory only for pdq queries where you have pdqpriority set ? In other words, if you are not running any queries with pdqpriority set, is that m…
many threads for process ?
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Re: SPL DATETIME bug ????
This performance fall off is only on datetimes, if the where clause uses integers then it's fine. If I drop the datetime select into the exec blade the performance is back to 0.3 Art S. Kagel wrote: > Paul Watson wrote: > > The difference is that effectively the second query/s…
RE: SPL DATETIME bug ????
check the explain for both query, I believe they are deferent. In the first query the optimizer know the range of date at optimization time, but in the second it do not. In each query he build deferent query plan. You should force the optimizer to work as the first query using di…
chunk capacity
we are using BM Informix Dynamic Server Version 9.40.UC2X3 on Linux Kernel 2.4.21 the command 'onstat -d' shows ... Expanded chunk capacity mode: disabled how can I change this mode to 'enabled'?…
Re: Stripe and Mirror Everything?
my two 0.01 haven't played much with 9.4 however i would use a certain number of dbspaces because of: 1: paralel dbspace backups 2: better use of PDQ ( a scan thread per dbspace ) 3: (re)loading tables using hpl can be faster when having multiple dbspaces. -- can be faster …
Re: HPL and PDQ
"Tisha" <loden@networkip.net> wrote in message news:8085cdee.0408240701.35b83299@posting.google.com... > Neil, > > Did you get this to work with onpload in 9.4? I have used HPL alot in > past releases and never gotten it to use the pdq settings for an index > build. My work aro…
IDS V7.30 and Windows 2000
Can Informix Dynamic Server Version 7.30.TC6 be run on a Windows 2000 host system? TIA Erwin…
Re: HPL and PDQ
Neil, Did you get this to work with onpload in 9.4? I have used HPL alot in past releases and never gotten it to use the pdq settings for an index build. My work around has always been to build the table with no indexes, load the data using hpl, and then build the indexes in a…
Re: HPL and PDQ
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Re: HPL and PDQ
> Hi Neil, > > How are u running the onpload. Are you using ipload or onpladm? > If that is the case then we might not be passing these environment > varaibles to onpload. onpladm.…
Re: HPL and PDQ
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HPL and PDQ
IDS 9.40FC3W2 on HP-UX11.11 I'm running an onpload (HPL) run job which is loading 35m rows to a table then enabling the indexes. The index "enable", which I understand to be an ordinary build in a different jacket, is taking much longer than I'd expect. I can see from the marve…
Re: Error Initialize Informix Dynamic Server
Art S. Kagel wrote: > On Wed, 04 Aug 2004 05:05:41 -0400, madiego wrote: >>I install Informix Dynamic Server and when I initialize 'oninit -iv' : >> >>This action will initialize Informix Dynamic Server; any existing Informix >>Dynamic Server databases will NOT be accessible - Do…
Error Initialize Informix Dynamic Server
Hello, I install Informix Dynamic Server and when I initialize 'oninit -iv' : This action will initialize Informix Dynamic Server; any existing Informix Dynamic Server databases will NOT be accessible - Do you wish to continue (y/n)? y Checking group membership to determine ser…
Re: how release threads?
This is a multi-part message in MIME format. --------------020301030302090906080606 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Well, at least I have discovered what status await_MC%d in onstat -g con (or onstat -g wai) of thread means…
Re: how release threads?
make sure when you update statistics for procedure you set pdq to 0...the stored procedures that help facilitatemay be mutltithreading if you do not and the thread count will increase until evetually you get an exception error which might crash the engine.…
Re: IDS9.4/AIX5.2 performace degradation
Dalibor, A piece of tuning advice that has many times hit this list, is that you should have one CLEANER per LRU. So, having LRUS = 8 implies that you should have CLEANERS=8 also, to keep up with the overhead. Ben Thompson wrote: > Dalibor Krleza wrote: > > I may have missed i…
how release threads?
dear all we have an java application running on websphere 5 and using jdbc connection pooling accessing data in IDS 9.40.FC3 on AIX 5.2, pdqpriority=1 there is 20 connections-user session used by appserver and reused within connection pooling by many users however, the number …
Re: IDS9.4/AIX5.2 performace degradation
Dalibor Krleza wrote: I may have missed it in your long post, but I didn't see anything about disc layouts or number of CPUs. Also I may have missed it as well but I couldn't see any output from "onstat -g iof" or "onstat -g iov". I have commented on your onconfig anyway. > OK …
Re: Dropped users on AIX 5.1
Hi CKGeier@nwc.edu, That almost sounds like an aging issue. In the a simlilar vein, I had a smililar problem that took me forever to figure out. The DBA here before me had an update statistics script that ran at 100 pdq and within that script he had set "update statistics for pro…
Re: Informix Dynamic Server and DB Tuning
I am experiencing similar problems with users migrating from Standard Engine to IDS 9.30. It appears that some applications are more susceptible than others. What application(s) are you running? We also have experience of adding more BUFFERS, LOCKS, etc and not improving the sit…
RE: Informix Dynamic Server and DB Tuning
Muthana Increase BUFFERS in onconfig file. UPDATE STATISTICS for each table (as a minimum) rerun the query and see what improvements you get. If you still have problems post the results of:- onstat -p onstat -m onstat -R and sqexplain.out of any particularly slow query or updat…
Informix Dynamic Server and DB Tuning
Dear Sir, The question how can make DB Tuning for Informix Dynamic Server version 9:30 to get the query faster. I used IDS 9:30 and it's not quick enough like our old Standard Engine. which Parameter can i change to make that or what shall i do? Regards Muthana AL-Temimi…
Re: PDQ not used ?
Thanks a lot for your help ! I found my problem. I mixed some things up... I set pdqpriority=100 in my sqlstatement (embarassed...).. WinSql didn't give me an error on it. But Right now, it works great ! Thanks a lot ! Bjorn "Bjorn De Waele" <bjornREMTHIS@pandora.Be> wrote …
Re: PDQ not used ?
Hi Bjorn. Try the following. % dbaccessdemo7 Execute the following sql via dbaccess set pdqpriority 100; select * from customer; Another terminal onstat -g mgm e.g) Here is a results of my test. [tsutoo@bygzam ~]tsutoo731ud7% onstat -g mgm Informix Dynamic Server Version 7.3…
RE: PDQ not used ?
Hi Bjorn. Make sure your parameter of onconfig file. DS_MAX_QUERIES # Maximum number of decision support queries DS_TOTAL_MEMORY # Decision support memory (Kbytes) If the avobe parameter is space, probably PDQ will not run. Specify DS_MAX_QUERI…
PDQ not used ?
Hello everybody, here's our Informix newbie again :) I'm just new in the company and nobody is a real informix specialist in our IT-team, so I try to pull it to me. I know that I should follow a course but we have no time for that cause the new server need to be live in 3 week…
Can IDS accessing Informix SE Tables.
Hello, Now we are using Informix SE. We are planning to go Infomix Dynamic Server 9.x. Before migrating our current applications to IDS 9.x., first we have to develop a new application in IDS 9.x, in that we need to use some of the tables from informx SE. Could you please answer…
Re: PDQ memory / non-PDQ memory
sumGirl said: > This is likely obvious, so feel free to treat me like a know-nothing > bimbo. If I must. :o) Actually, I can't. There's no joy in it when it gets offered up on a plate like this. -- Bye now, Obnoxio "C'est pas parce qu'on n'a rien � dire qu'il faut fermer sa g…
RE: PDQ memory / non-PDQ memory
Formally, PDQ memory is not 'reserved' when PDQ is not running. It is accessible to other sessions .... This is theory. In fact, this memory can't be allocated to memory-hungry subsystems, such as buffer cache. If other sessions allocate a lot of memory from the same pool (V se…
PDQ memory / non-PDQ memory
This is likely obvious, so feel free to treat me like a know-nothing bimbo. If I dedicate X amount of memory to informix and set Y available to PDQ - is Y amount available to non-PDQ processes when not in use? Or is it always reserved and sitting around doing nothing when I am no…
Dose anybody have the dbtop script in the Troubleshooting informix course?
Dears, I study the Troubleshooting ibm informix dynamic server course. At the module 4 exercise need the dbtop script. Dose anybody has this dbtop script and post for me? Thanks. Philip Yeh.…
PDQ priority
We have an application written in Java (server side JBOSS application server) and would like to give certain users a higher priority. I don't want to set it via the environment variable since that would raise the priority for everyone. It it possible to set the PDQPRIORITY via ja…
Work group edition - Unlimited edition??
Taken from IBM web site:- =========================================================================== The following Informix Dynamic Server Workgroup Unlimited editions have been added to the IBM Data Management Gold Transaction Processing Bundle for SMB Unlimited: IBM Informix…
Re: [Informix Dynamic Server (IDS):] Digest 2671
For a course in the US, check out: http://www-306.ibm.com/services/learning/ites.wss?pageType=course_description&co urseCode=L1760&country=us&language=en (IBM course L1760). There is probably a similar course offered in Europe somewhere. Hope this helps. Kevin Doiron Toronto,…
Re: Re: Query Permormance improvement: URGENT
>Nonsense. The order in which the optimiser decides >to do the processing is critical. I Agree, but as long as the optimizer give a plan wich has some _sense_ , which is certain almost all the the time... But in the cases when the optimizer plan is _nonsense_ (statistics et all…
Re: Transaction support in informix dynamic server(IDS)
chaithra wrote: > i wanted to know, if in IDS we can get to know the status of a > transaction at any given time. or once any transaction commits or > rollsback we should be able to know the status. > is it possible through c++ interface provided by the IDS. I'm not quite s…
Transaction support in informix dynamic server(IDS)
hi all, i wanted to know, if in IDS we can get to know the status of a transaction at any given time. or once any transaction commits or rollsback we should be able to know the status. is it possible through c++ interface provided by the IDS. thanx in advace chaithra…
Re: Slow reposnse
By apparently allowing all your users to gain a PDQPRIORITY of 8 you are limiting the number of concurrent queries to 11. Any that would take the sum of the PDQPRIORITIES above 100 will just sit there at the "gate" and show up in the Ready Queries list. Suggest you: - Set MAXPDQ…
Re: Re: Slow reposnse
Hi Neil, ----- DS_MAX_QUERIES: 10 <<- max DS queries that can run simultaneously is 10 . Queries: Active Ready Maximum 10 11 10 <<- 10 running, 11 are ready (ie waiting). you are most likely competing for PDQ resources . Load Control: …
Slow reposnse
Neil Truby wrote: > "Fernando Nunes" <spam@domus.online.pt> wrote in message > news:bve3cb$qvajr$1@ID-161111.news.uni-berlin.de... > >>Did you start the engine with PDQPRIORITY on? >>Apparently even simple queries have several threads... >> >>Are you issuing grant/revoke stateme…
Re: Query Optimization ... Is this all I can get??
The reason your original solution didn't work well is that You needed to have the correct indexes, which you have added and then the outer join query should be better and faster. > Although your first option would work in my case, it would be a mess, > as they would have to be O…
configure computer for using informix
what shell I do to make my computer work with informix. I have installed winXP on my computer, informix 4 i informix dynamic server? THANKS…
Re: Query Optimization ... Is this all I can get??
Anthony Presley wrote: > > Although your first option would work in my case, it would be a mess, > as they would have to be OUTER joins of the address and phone table, > and the joining of some 100K with 300K with another 150K takes some > time [although, this was my original sol…
Re: Query Optimization ... Is this all I can get??
Yes - (amendment to my own response) - it's usually best to head an index with the most selective column, unless you have lots of queries that only reference the other column(s) or have an ORDER BY or GROUP BY that requires the index to be in a particular sequence. As for UPDATE…
Re: Query Optimization ... Is this all I can get??
Thanks for everyone's advice. Unfortunately, I am using a combination of Java and I4GL (moving everything to Jasper Reports at the moment), and was just using the "FOREACH" as an example. In reality, it is a for loop. I first added the (type, type_id) index, and then did an up…
Query Optimization ... Is this all I can get??
Hello all .... Always with the query questions .... so I come to you once again. 1st -- my textbooks on this subject are rather sparse, and a bit ... un-useful. Anyone have any good links / articles / books on query optimization? 2nd -- the actual problem .... I have a SIMPL…
Where can I get the client API?
Hi, does anyone knows where to get the client API for Informix Dynamic Server 7.x? Perhaps we want to access the server via api directly. Kind regards, Joachim Engel.…
RE: What do session statuses mean?
Wait master consumer. eg. a scan thread waiting for a consumer thread like a sort thread, join thread etc. Regards, Bill > -----Original Message----- > From: andykent.bristol@virgin.net [SMTP:andykent.bristol@virgin.net] > Sent: Monday, December 15, 2003 4:43 AM > To: informix-…
Informix optimizer
Hi, Does anyone know if the Informix Dynamic Server (7.31 or 9.4) database optimizer uses star schema optimizer techniques? Thank you, Tony…
Re: Informix thread management
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Re: PDQ and 940
Paul, I am using the same verision 9.40 fc2, Solaris 2.8 and do not see this. Rich "Paul Watson" <paul@oninit.com> wrote in message news:3FCBA46A.2F42895@oninit.com... > Sun Solaris 2.8 64bit > 9.40.FC1/2 > > I can't turn off PDQ unless it's done in the onconfig. Queries > t…
PDQ and 940
Sun Solaris 2.8 64bit 9.40.FC1/2 I can't turn off PDQ unless it's done in the onconfig. Queries that were running under 9.30 now take forever as long and spawn 20+ threads Anybody else seen this -- Paul Watson # Oninit Ltd # Growing old is mandatory Te…
TRUNCATE TABLE command in 9.3?
I am aware that Informix Dynamic Server previously has not included the TRUNCATE TABLE command. Does anyone know if 9.3 or 9.4 include this command?…
Workgroup Edition or Enterprise
Olmedo Monteverde wrote: > Nope. Between other features, PDQ is not available. Actually, I think it's more subtle than that - Fragmented tables are not available, but PDQ is. Fragmented tables are the premier beneficiary of PDQ with large queries, however PDQ does have other us…
Linux fgl_getenv
Informix Dynamic Server Version 9.30.UC3 on Linux. Do I have to do something before I can use the fgl_getenv call in a stored procedure? When I try I get 674: Routine (fgl_getenv) can not be resolved.…
Re: PDQ
Attachment is missing!!! Gorazd "Rajib Sarkar" <rsarkar@us.ibm.com> wrote in message news:bn8r6t$2v2$1@terabinaries.xmission.com... > > Actually, Obnoxio is kind of right ..:-) Although this parameter is not > new, this parameter has been "upgraded" to accomodate a) More memory…
Re: PDQ
On Wed, 22 Oct 2003 19:14:12 -0400, David E. Grove wrote: Yes! This is why my dostats utility explicitely sets PDQPRIORITY to zero (or a value specified with the -P option) for stored procedure updates regardless of the PDQPRIORITY value in the user's environment (or specified …
Re: PDQ
On Thu, 23 Oct 2003 04:50:06 -0400, Mark D. Stock wrote: > Obnoxio The Clown wrote: > >> David E. Grove wrote: >> >>>>makes a big difference to stuff like index creation and update stats. >>> >>>We learned to be careful with PDQ and UPDATE STATISTICS. >> >> There is a new enviro…
Re: PDQ
Mark D. Stock wrote: > Anyway, thanks for the update. In what version was this parameter > "upgraded"? I think 7.31xC6, somewhere in the 9.30 stream (xC4?) and 9.40. Not too sure of 9.30. -- Ciao, The Obnoxious One "Ogni uomo mi guarda come se fossi una testa di cazzo"…
RE: PDQ
Rajib Sarkar [mailto:rsarkar@us.ibm.com] > > Actually, Obnoxio is kind of right ..:-) "Kind of right"? "Kind of right"? Cheeky! :o) -- Ciao, The Obnoxious One "Ogni uomo mi guarda come se fossi una testa di cazzo"…
Re: PDQ
Mark D. Stock wrote: > > Obnoxio The Clown wrote: > >> David E. Grove wrote: >> >>>>makes a big difference to stuff like index creation and update stats. >>> >>>We learned to be careful with PDQ and UPDATE STATISTICS. >> >> There is a new environment variable (DBUPSPACE?) which,…
Re: PDQ
Rajib Sarkar wrote: > > Actually, Obnoxio is kind of right ..:-) Although this parameter is not > new, this parameter has been "upgraded" to accomodate a) More memory for > sorting b) To print out the progress of update stats (explain plan). It's lucky I added the proviso, "Unl…
RE: PDQ
Great paper ! a few months ago i got an error when running update statistics for a very big table : "Not enough space for sorting" ... or something like that . My IDS Version is 7.31.UD1 How can I avoid this error? By Using DBUPSPACE environment Variable ? Thanks in advance …
Re: PDQ
Obnoxio The Clown wrote: > David E. Grove wrote: > >>>makes a big difference to stuff like index creation and update stats. >> >>We learned to be careful with PDQ and UPDATE STATISTICS. > > There is a new environment variable (DBUPSPACE?) which, when used with PDQ > will allocat…
Re: PDQ
> makes a big difference to stuff like index creation and update stats. We learned to be careful with PDQ and UPDATE STATISTICS. In a past job, I had been working mainly with a data warehouse. In that environment, I made constant and effective use of PDQ, and didn't think anyt…
Redbrick Query Optimizer behaving funny.
Hi All, Today I saw very funny behaviour of Redbrick query optimizer where the order in which tables are listed in the from clause is controlling the indexes being used. I am sending the results of explain for both the conditions: CONDITION 1: ============= RISQL> explain …
PDQ
Hi guys, since the price-differences betwen IDS 9.4 and IDS 9.4 WE are not marginal, I wondered, whether it's worth to buy a IDS 9.4 in order to be able to use PDQ. May be it's better, to invest the difference-amount in better hardware. Does anyone of you have expieriences in u…
Re: Product Defect Query no longer available????
On Tue, 2 Sep 2003 09:19:18 -0500, kernoal.stephens@autozone.com wrote: > >https://www-927.ibm.com/software/data/informix/support/pdq/ > >PDQ alive and well! > > Verified . . . .…
ALTER FRAGMENT goes walkabout
Neil Truby wrote: > [stuff] hmmm - is your engine setup in such a way as to encourage PDQ index builds? If so, perhaps the ALTER FRAGMENT is not triggering the much faster PDQ builds?…
RE: Dynamic Server versus Universal Server ??
Originally, Version 7.x was called 'Informix Dynamic Server', Version 9.0x was called 'Universal server' Starting with 9.1, Universal server became 'Dynamic server with Universal data option'. With 9.2, new names 'Internet Foundation 2000 ' and 'Dynamic server 2000' ware given…
Informix Dynamic Server 2000 startup problem
Hi, While starting up informix in multi user mode , we wait for the database to come up by checking the onstat - o/p . But if the system is loaded, even after onstat shows status as online , the connection is rejected by the database . The wait loop that we do is as follow…
OPT_GOAL setting at 4gl level
Hi, I have checked the manuals about where I can set the OPT_GOAL parameter. Below are the IBM docs, but they do not specify if I can set the OPT_GOAL in the 4gl code. Can anyone confirm if I can set this in the 4gl code? If I must do this at the session/user level, I assume this…
why I can't see the output of "onstat -g wts"
test:/informix>onstat -g wst Informix Dynamic Server 2000 Version 9.21.FC7 -- On-Line -- Up 5 days 13:23:03 -- 11132960 Kbytes Wait statistics not enabled How to enable the wait statistics???…
informix SDK 2.81 ifxoledbc OLEDB and ADO
When Updating or deleting a non existing row in a table, the informix oledb provider produces an "UnSpecified error". Environment: Informix Dynamic Server 7.31 Informix SDK 2.81 ADO 2.6 Any help will be appreciated. Thanks in advance…
Re: OPT_GOAL
On Tue, 20 May 2003 10:00:30 -0400, Greg Mitchell wrote: Setting OPT_GOAL to zero (or using FIRST_ROWS optimization in SET OPTIMIZATION or optimizer hints) is useful for internactive applications where records will be displayed a few at a time. It makes the app appear to be mor…
Re: Questions re NUMCPUVPS, PDQPRIORTY, AFF_NPROCS and AFF_SPROC
Hi 1) As for my experience if you have only DB on your server and you do not have large WAIT IO define all cpu to informix. If you have a lot of users and you are using NET VP check there cpu usage, maybe you should spare one or two cpu for them. 2) Probably the first SQL use i…
Re: Performance & checkpoint
you can double your LRU number to decrease your checkpoint duration. I have been suffered the same problem and I increase my LRU from 128 to 512 and I really help. Also you can increase your CKPTINTVL from 300 to 600. "Wayne T" <ntrieu@yahoo.com> ???????:e6623a40.0305121517.15f3…
new scan threads
I was tuning my informix with the onconfig and env variables, when I saw the output of onstat -g ses <sesid> with something like this: tid name rstcb flags curstk status 78 sqlexec b154a5b4 ---P--- 67400 b154a5b4 sleeping(secs: 3) 112 scan_1.0 b1553554 ------- 68296 b1553554 run…
RE: PDQ Woes
PDQPRIORITY sets the amount of PDQ resources that will be used by a query. When you set it to 75 it means that it will use 75 percent of PDQ resources (Memory, Threads, etc.). When you run onstat -u you saw multiple threads not multiple sessions. If you run onstat -g sql <sid> fo…
PDQ Woes
OK, so a user job has been running now (we joke not), 2 days on one little select, ok its lots of data. So I kill it, my box was grinding. I run it with MAX PDQ at 10, it crawls, my box crawls. I set PDQPRIORITY=75 (I know, but I'm the admin and no-ones gonna …
Re: FW: PDQ
Dirk Moolman wrote: > > I have 5 CPU VPs, so this shouldn't be the problem. I've been meaning to > read a bit more about PDQ - I've just been a bit busy. > > I touched a little on PDQ in 7.30 I'm now working with 9.21FC1 and have > to just touch up on PDQ again. I did set th…
RE: PDQ
While we're on the topic. XPS 8.31 has implicit PDQPRIORITY. In other words the optimizer can decide what to allocate for your query. cheers j. > -----Original Message----- > From: Dirk Moolman [mailto:dirkm@reach.co.za] > Sent: Wednesday, February 07, 2001 7:06 AM > To: info…
RE: PDQ
PDQ gates on CPU VPs as well? Something new. cheers j. > -----Original Message----- > From: Art S. Kagel [mailto:kagel@erols.com] > Sent: Wednesday, February 07, 2001 3:20 AM > To: informix-list@iiug.org > Subject: Re: PDQ > > > How many CPU VPs do you have? PDQPRIORITY 50 im…
FW: PDQ
I have 5 CPU VPs, so this shouldn't be the problem. I've been meaning to read a bit more about PDQ - I've just been a bit busy. I touched a little on PDQ in 7.30 I'm now working with 9.21FC1 and have to just touch up on PDQ again. I did set the PDQ parameters in the onconfi…
RE: what is light scan and look aside??
All of these 'advanced' questions. Are you retreading from some other vendor? You should consider a course. Light Scan: Normally when you read a table, you go through the buffer pool. That is your row is retrieved from disk, stuck into a buffer, an LRU entry is made to track…
RE: PDQ
This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C09058.C3BD1BEA Content-Type: text/plain; charset="iso-8859-1" PDQ is a resource. If there is insufficient of that …
FW: PDQ
This is a multi-part message in MIME format. ------=_NextPart_000_0060_01C08E29.BB8B3640 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I think it has to do with the type of query I run, that some queries use PDQ and others not ........ Dirk -…
PDQ
This is a multi-part message in MIME format. ------=_NextPart_000_005A_01C08E0D.B35BA2A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi, I just ran into something very strange. I am running to queries on my system (doing my weekly maintenanc…
RE: exchange thread?
I believe they are called exchange iterator, but whatever. (I'll talk it through from an XPS standpoint) The query plan that actually runs (let's say for a hash join) looks something like: scan tab1, build hash table scan tab2, probe hash table project insert (if you happe…
RE: PDQ_PRIORITY parameter!
PDQ is 100 words or less. This may even be reasonably accurate. When you run a query, issue a SET PDQPRIORITY x where x is some valus between 0 and 100; You can also export the environment variable PDQPRIORITY=x I'm not going to try to analyze what you've set it to here witho…
PDQ_PRIORITY parameter!
Note that PDQPRIORITY values of 0, 1 & 2 are special values. 0: No parallelism 1: Minimal parallelism (same as LOW) 2: Lowest setting that give full parallel features. See the Performance Tuning Guide and the Administrators Guide for details. Art S. Kagel Murat YILDIZ wrote: …
What requires an IDS Linux?
Hello What requires an Informix Dynamic Server Linux a desktop and/or a network version of Linux? Thanks in advance Jacqueline Romero Miranda…
Informix v Oracle
Hi Is there a function in Informix Dynamic Server 2000 that is like Oracles CREATE SEQUENCE that uses NEXTVAL/CURVAL and %ROWCOUNT, ect? Thanks for all contributions Jordan jbruce@asaglobalserv.com…
How do I set FIRST_ROWS for client session?
Set the environment variable OPT_GOAL=0 or add a SET OPTIMIZATION FIRST_ROWS in the apps. Art S. Kagel bafarwell@earthlink.net wrote: > > Does anyone know how to set the FIRST_ROWS optimization goal for a > client session (i.e. Windows client using native libraries, setnet) so …
Retrieving product name
Hi all, Is their a system table somewhere on an informix server that stores the product name. For example 'Select owner from systables where tabname = � VERSION� will return the version of the server. I would like to be able to tell if a server is a Universal server or a Dynamic …
IDS 7.3x on Win2000?
Does Informix Online Dynamic Server 7.3x runs on Windows 2000 (Professional)? Thanks for your help. Guy Dillen…
performance with very active threads
During a checkpoint you only have 8 cleaners utilized to flush 63 LRU's. That's 4 passes. Make LRUS=64 and CLEANERS=64. That's one pass. Let the disk subsystem figure out any contention. They're pretty good at that:) Also increase CKPTINTVL to every 30 minutes. Why have a …
Query Optimization: Wrong execution plan?
Hello All, I have a problem with a query: The query is the join of two tables select * from tab1, tab2 where tab1.pk=tab2.fk There're indexes on both fields (unique index on tab1.pk and indexes with duplicates on tab2.fk). The problem is that the query takes too much time. …
onperf utility
Art S. Kagel wrote in message <39932718.4CD3DFD6@bloomberg.net>... >Francois La Haye wrote: >> >> Hello, >> >> Did anybody used the onperf utility ?? Any comments on this tool ? > >PHLEH! > >Too few variables tracked, too many crashes. > >Art S. Kagel Can't remember if it is …
Re: How to search for a string in a TEXT field
Hi, :-( SELECT name, REPLACE(text,"ZNOTREADY","found") AS your_output FROM tablewithtextfield; Blobs are not allowed in this expression. I use Informix Dynamic Server Version 7.31.UC2A…
FWD: latch contention
I wanted to open discussion on some of the info from onstat -g spi and what might alleviate contention for certain resources. Here is a list of latches which I have an interest in and my thoughts on what they might mean. --shmcb sh_lock From what I have read, I think this migh…
Performance comparison btn Informix and SQL Server
Thanks for all the suggestions, I will try them out, and give a summary about the results. P.S. One small question I have now is: optimizing one query brings another one down! :-( At least I have one query which takes double so long as it took before I run UPDATE STATISTICS.…
People Soft and Informix 7.2
Informix DSA 7.2 Platform: Sun SPARC SunOS 5.5.1 4 CPUs Has anyone found it advantages to turn PDQ on with PeopleSoft version 7.01? TIA Cheryl L. Kendricks Sr. Database Analyst H.E. Butts Grocery San Antonio, Texas…
Create user in Informix Dynamic Server
Hello all I`m new in INS. Could you help me? I have Database server with one user Informix. How to create another user to Database?…
Re: Performance Problem
From: chivaviro1379@my-deja.com > >I have the configuration below running on HP-UX B.11.00 U 9000/800.on >L100 class which is 64bit machine. >I have run update statistics but nothing significantly has improved. >Also my backup takes long. Checkpoints are as low as 8 seconds and I…
Re: DS_MAX_QUERIES & DS_TOTAL _MEMORY parameter
These parameters are used by Informix to determine the amount of resource to allocate for a Parallel Database Query (PDQ) DS_MAX_QUERIES - this specifies the maximum number of PDQ that can be execute at any given time. This parameter is quite subjective based on the number of …
Informix ODS on Win 2000?
Does Informix Dynamic Server V7.31.TC5 for Intel Pentium Windows NT 4 also run on Windows 2000? Thanks for any help. Guy Dillen ITP…
IDS 7.31 on DEC Unix
About month ago I have performance problems on 2 CPU DEC Alpha and one of advises was to add more CPUs. So we change old one Alpha with new one. New is Alpha 4100 with 4 CPUs and 2G of RAM. KIO is enabled. Now I have some problems: *************** 1. problem *******************…
Data type conversion in query
Does anyone out there know how to force the optimizer/engine to convert data types in a query? I have a query that is joining a CHAR(20) column to an INTEGER column. Right now it is trying to convert the CHAR to an INTEGER which won't work. If I could make it convert the INTEGE…
Informix cost???
Someone can said how much does Informix cost? I need to know: -Informix costs -cost for client Thanks very much. I need the last version of dynamic server for Unix. Ciao, Berna…
first 'n' rows
sveiga@my-deja.com wrote: > > In article <0cefcfc2.92a34d23@usw-ex0106-048.remarq.com>, > Esther <estherNOesSPAM@ts.es.invalid> wrote: > > I would like to know how can I use the "FIRST_ROWS" optimizer > directive > > and the "SELECT FIRST 'n' ROWS" directive. I don't know the s…
PDQ PRIORITY
Hi All, I have IDS 7.3 under Win NT., In the onconfig file I have set the max_pdqpriority=100 and also I have set the environment variable pdqpriority=100, when I see onstat -g mgm it still shows me the max_pdqpriority=0. Can anybody pls.tell me the reason or help me out ? Th…
Replication
Hello everybody. I would like to know if it is possible to replicate an Informix database between a UNIX-based 7.32UC2 Informix Dynamic Server and an linux-based IDS2000 without problems. Thanks in advance. jhernandez@geuropa.com…
Left join ignores optimizer directive
Hey, I'm wondering if anyone out there has had difficulties with left joins? Our query goes incredibly slow with optimize set high and fairly quickly with it set low. In order to improve performance, we brought in a performance expert who specified some optimizer directives. W…
PDQ PRIORITY
Hi All, I have IDS 7.3 under Win NT., In the onconfig file I have set the max_pdqpriority=100 and also I have set the environment variable pdqpriority=100, when I see onstat -g mgm it still shows me the max_pdqpriority=0. Can anybody pls.tell me the reason or help me out ? Th…
PDQ on ANSI Databases
Hi All, I've been trying to execute a parallel database query (PDQ) on an ANSI database. But everytime I run onstat -g mgm it doesn't register it as a PDQ and no resources were allocated. I tried doing this on a non-ANSI database and they were no problems. BTW, I am using IDS …
OPT_GOAL
matur_suksema@my-deja.com wrote: > Has anyone experimented with changing the default for OPT_GOAL from all > row to first rows? Would anyone recommend using first rows for a 200+GB > database? Does anyone have any good/bad experiences that they can > share? You use FIRST_ROWS…
dynamic server with Informix distant database
We have this problem : - write of a html page (this pages will contain many many fields). - Receiving of the page data on a http server based on a M1 machine. - Using of 4gl/informix programs based on the M2 machine with the pages data - 4GL programs will set up a � result � tabl…
HELP! Informix Dynamic Server 7.3
I'm trying to install a new IDS on Linux (RedHat 6.1) on a cooked file. Everything looks right, but upon oninit, I receive the following: oninit: Cannot open chunk '/u1/naf_chunk'. errno = 2 oninit: Fatal error in shared memory initialization Log reflects: 09:11:07 Informi…
UDR Support in Informix Dynamic Server.
Can someone tell me what exact version of Informix Dynamic Server that first supported C User Defined Routines. I've tried searching for this on their website with no joy. (their advanced search doesnt work at all !) Rgds, Peter. Sent via Deja.com http://www.deja.com/ Before y…
OFFICE Connect V.1
Informix Office Connect, Version 1.0, is compatible with the following Informix servers: Informix Dynamic Server, Version 7.3 or later Informix Dynamic Server with Universal Data Option, Version 9.14 Informix Dynamic Server 2000, Version 9.2 or later e Informix-SE 7.23 n�o func…
PDQ question
We have a fragmented table (round robin) in two dbspaces with two detached indexes in a third dbspace. All dbspaces are on different disks. PDQ priority is set to 100, the machine has two processors Selecting all rows (sequential scan) results in 3 Informix threads and evenly d…
RE: PDQ Advice Please
For a OLTP instance and doing large queries and update's, setting PSORT_NPROC and PSORT_DBTEMP are a better way to use the parallel processing features in Informix IDS or even 5.x instances. Check that out, before doing down the PDQ path. Wayne E. Martin Informix Database Admini…
Re: PDQ Advice Please
From: "Tony Flaherty" <aef@mfs.misys.co.uk> > >Hp-Ux 10.20 >IDS 7.30.UC7 > >We have a OLTP set-up with occasional large queries/updates running during >the day. I've not paid that much attention to the PDQ settings previously >:o/ I thought it was disabled. However I've started…
Re: PDQ Advice Please
Tony Flaherty wrote: > > HI, > > Hp-Ux 10.20 > IDS 7.30.UC7 > > We have a OLTP set-up with occasional large queries/updates running during > the day. I've not paid that much attention to the PDQ settings previously > :o/ I thought it was disabled. However I've started reading u…
CPUvps
Madison Pruet wrote: > > I think that Mark Stock has already raised the question of 'more CPUVPs than > physical CPUs'. I'm going to attempt to address CPUVP scheduling. > > We don't attempt to equalize the load of the CPUvps because unlike disk IO there > is nothing to be gaine…
Re: Fragmented table and PDQ
mars1972@my-deja.com wrote: > > In article <89lig9$1jm$1@news.xmission.com>, > dins dins <dins_d@yahoo.com> wrote: > > > > Hello! > > > > IDS 7.31.UC4-1, on HP-UX.10.20 > > > > I'm trying to use PDQ on fragmented table query. > > With set PDQ SELECT statement works about two > …
Fragmented table and PDQ
In article <89lig9$1jm$1@news.xmission.com>, dins dins <dins_d@yahoo.com> wrote: > > Hello! > > IDS 7.31.UC4-1, on HP-UX.10.20 > > I'm trying to use PDQ on fragmented table query. > With set PDQ SELECT statement works about two > times longer, than without PDQ. > > Environment …
System catalogue
Hello! Can anybody explain me how I can create trigger on "informix".systables? (The server I deal with is Informix Online Dynamic Server 7.3.) Max…
Query Optimizer Weirdness in Stored Procedure
(Environment: Sun Enterprise/450, SunOS 5.6, Informix 7.30UC5) Greetings All! Has anyone out there encountered this same problem, and figured out a solution? I have a single table with over 10 million records in it. I am trying to retrieve a small number of records from it ba…
listener-thread: error
Alexey Semenov <swaj@swaj.nospam.ru> wrote: > Hi! > I got messages in /opt/online.log approx. twice an hour: > ... > listener-thread: err = -27001: oserr = 0: errstr = : Read error > occurred during connection attempt. > ... There is probably something on your network that po…
Compatability between Informix products
Hi, I need some version compatability information for the following products. Hardware Platform: Hewlett Packard OS Platform: HP-UX version 10.20 Informix s/w: Informix Universal Server 9.20 Informix Dynamic Server 7.31 Informix Gateway to DRDA vers…
Re: checkpoints taking as much as 25 secs
Try modifying your LRU's to something like 63. Make your page cleaners equal to your LRU's value. I find I get considerable performance from my server set this way. As well, checkpoints on high end machines running hundreds of users using ~10GIG+ databases range from 1 -2 secs. …
OPTIMIZER DIRECTIVES IN 4GL
Hello. I can use optimizer directives from dbaccess / Query Language, but they don�t work in a 4gl-program. The engine is IDS 7.30.UC2-1 and RDS-4GL is 7.20.UD7 on a SCO OpenServer 5.0.5. Example: select {+INDEX (tablename indexname)} * …
RE: Index build speedup
A couple quick items to check. Do an onstat -g mgm and check the DS_MAX_QUERIES, DS_MAX_SCANS, and DS_TOTAL_MEMORY parameters. You may need to increase these. As you adjust one (using onmode) watch your quantum values...you want small quantum values. I usually just work with the …
ODBC and PDQ
I'm hoping one of you can help me. I want to set up ODBC data sources on NT and 95 client machines such that PDQ is set or not set on a per data source basis. For example, I've got data source X and data source Y. Data source X has PDQPRIORITY unset. Data source Y has PDQPRIO…
informix dynamic server on linux help
Hi all, I am an informix newbie, and i have problems running it on redhat linux 6.0. The installation went just fine, but now when i start dbaccess and try to create a new database i get this error message: 25584: Network driver can not access server program /opt/informix/lib/sq…
Informix Dynamic Server on IBM SSA
Can any one share their experiences, recommendations, pit-falls, comments about creating an IDS db engineOLTP environment on an IBM SSA Raid system? We have 2 SSA adapters and have 4 loops with 4 drives each. The IBM techs for the Smoothstart services will be coming next Tuesday…
Re: reorgainising dbspaces
In article <7vajn9$kh0$1@news.xmission.com>, Mark D. Stock <mdstock@myda s.freeserve.co.uk> writes >> Surely fragment across 2Gb dbspaces. More dbspaces = mre scan threads. >> Also scanning two fragment in parallel on the same disk will result >> in a lot of time spending s…
Please help me!
Hello! 1, Can somebody give me information, what is the new features for Version 7.24 of Informix Dynamic Server according to Version 7.20 of Informix Dynamic Server? 2, Are Version 7.20 of Informix Dynamic Server and 7.20 INFORMIX-ESQL/C 2000 Year Compatible? 3, W…
query optimizer (set explain) question
i've run set explain on three different systems (all hpux 10.20 with informix ds 7.3 uc2) the databases in question are the same schema (tables and indexes, same onconfigs, etc.) on each machine (however number of rows in each table varies. I ran set explain on each machine with…
Re: URGENT! How many rows will be returned?
I smell a troll here... Different databases use different technologies for query optimization and some are far better than others. Some 'so-called' optimizers need subtle hints to steer queries while others produce cost estimates based on statistics. Each database on your cros…
Re: installing Informix dynamic server
From: "Joerg_Mauz@abs.org" <Joerg_Mauz@abs.org> > Is there something wrong the the gateway, Hotmail or are there just loads of idiots posting today. (Apart from me, that is! :-) ______________________________________________________ Get Your Private, Free Email at http://www.hot…
Re: IDS PDQ
From: sfcawley <sfcawley@interaccess.com> > >Is PDQ an option that has to be turned on? Is it an option that would be >recommended for an OLTP application (or is it DSS specific functionality)? > >I would like to ensure optimum performance from my production server and >am not s…
IDS PDQ
Is PDQ an option that has to be turned on? Is it an option that would be recommended for an OLTP application (or is it DSS specific functionality)? I would like to ensure optimum performance from my production server and am not sure if PDQ is appropriate in an OLTP environment.…
PDQ
Is PDQ an option that has to be turned on? Is it an option that would be recommended for an OLTP application (or is it DSS specific functionality)? I would like to ensure optimum performance from my production server and am not sure if PDQ is appropriate in an OLTP environment.…
installing Informix dynamic server
hi all, can anybody give me an URL where to find a good description of how to setup and install an Informix Dynamic Server with using RedHat Linux ??? I've searched a whole day but founf nothing useful.. :( thx ind advance joerg…
Help! Cant start database service
Hello All I had my informix dynamic server (7.3) running fine till a few days back. Now the dynamic server service and the informix messenger service won't start automatically and if I try to start the server, it does start but I'm unable to connect to it. If I try to start the…
Re: Parallel index building
From: Thomas Mieslinger <thomas.mieslinger@germanparcel.de> > >I have a large table fragmented in three dbspaces on three disks. When I >do an create unique index then the iostat tells me the DBMS is reading >just from one disk not from three. > >I'm using Solaris 2.6, IDS 7.31UC…
Re: Parallel index building
Thomas Mieslinger wrote: > > Hi *, > > I have a large table fragmented in three dbspaces on three disks. When I > do an create unique index then the iostat tells me the DBMS is reading > just from one disk not from three. > > I'm using Solaris 2.6, IDS 7.31UC2 and the following D…
Parallel index building
Thomas Mieslinger <thomas.mieslinger@germanparcel.de> writes: > Hi *, > > I have a large table fragmented in three dbspaces on three disks. When I > do an create unique index then the iostat tells me the DBMS is reading > just from one disk not from three. > > I'm using Solaris …
RE: Prepared statement vs Exec sql insert/update/select
> Is there any benefit to preparing and executing sql statements > rather than just having them in an exec sql insert/update/select.... [Bill Raper] In the Informix world, there is a very significant benefit. This is in the fact that the optimizer processes are run only once …
Informix Online Dynamic Server DBA Book
Hello Could anyone recommend a good Informix Online Dynamic Server book. I did a search in Amazon.com but I could not decide on which one to choose. Thanks in advance. Ajay…
One HUGE Query - any optimizers?
This is a multi-part message in MIME format. ------=_NextPart_000_0082_01BEF4B3.58C19EC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I've developed a program which constructs the following query and then = executes it. INSERT INT…
PDQ
Can anyone offer any rough guidelines for using PDQ? Mainly, what percentage of SHM_VIRT_SIZE should be allocated to DS_TOTAL_MEMORY for DSS? Thanks, Andrew Ford Simplified Telesys 5000 Plaza on the Lake Suite 170 Austin, TX 78746 United States (512) 425-9767…
pricing for informix info?
Hello, Was wondering what other people out there paid for informix dynamic server 7.3... Basically, i wanted to know if they had a web server licensing schem like microsoft. or ibm's db2 (per cpu license). and would the licenses be transferable if I decided to move from le…
How to set pdq in a 4gl? (no manual and online manual doesn't come up!)
how to set pdq in a 4gl? (no manual and online manual doesn't come up!)…
Re: Determining version dynamically
Hi, If you have Informix Dynamic Server then use the following sql-statement ' select DBINFO('version', 'full') from systables where tabid = 1' result from the sql is : Informix Dynamic Server Version 7.30.UC5 Take a look in Informix Guide to SQL: Syntax for more about DBINFO…
KAIO: out of OS resources error
Hi~ My informix dynamic server write "KAIO: out of OS resources error .." in online.log. This error log is written during ontape task. How can I solve this problem? platfom : SunOs 5.5.1 Informix Dynamic Server 7.24 uc6 Thanks.…
64bit IDS for Solaris 7/SPARC ?
Is there a 64bit Informix Dynamic Server 7.3x for Solaris 7/SPARC available? tia, joerg…
Posting from the Informix-list
what is the last version of Informix Dynamic Server for HP-UX 10.20, where can i find more Information about this.…
Latest versions for various Informix products ???
Which are the latest versions for Informix Dynamic Server Informix Dynamic Server, Workgroup Edition Informix 4GL Informix SQL on Solaris 7/SPARC ? Where can I find such informations on Informix's website ? tia, joerg…
Re: Help optimizing query (newbie)
Just a quick thought. If you are using transation logging it will be worth will creating the temp table with the no log option so it does not to any transaction logging. Nayan Jain wrote in message <7lapvi$3im$1@news.xmission.com>... > >Hi ! > >Just thought of correcting one thi…
Fragmentation and Optimizer
Hi people, I'm with some kind of problem using fragmentation. Here is the situation: I've send this DDL to my database server (Informix Universal Server 9.14 TC1 - WIndows NT). ------------------------------------------------------------------- create table fragmenta ( …
cdr command line utility in informix 7.24
Hi, Is there a cdr command line utility in informix dynamic server 7.24? I tried to locate it, but the executable is nowhere to find. Thanks, Lu…
Optimizer question
Hi all, Informix Dynamic Server Version 7.30.UC6 Can someone please tell me if the optimizer takes into account the number of extents for tables when deciding on a query plan? Thanks Steve _______________________________________________________________ Get Free Email and Do …
Problem Installing Informix Dynamic Server
I downloaded a Try&Buy version of Informix Dynamic Server V7.30 for NT. I installed it on an NT Server. The install seemed to go ok, but after a short time of investigating IECC, I got a blue screen. After this when I started the Command Center, a task seemed to start, but it w…
Online index usage in one table query
In article <37861A36.3B9B6FAB@bloomberg.net>, kagel@bloomberg.net wrote: ..snipped > To the first > question, if your query is prepared with replaceable parameters the > optimizer does not know at prepare time when it is deciding on a query > plan what the actual values will be…
Re: Help optimizing query (newbie)
Hi ! Just thought of correcting one things here On Mon, 28 Jun 1999, Peter Sloboda wrote: > Frank T. Ramb=F8l wrote: >=20 > > Hi. > > > > I am trying to run the following statements on a rather huge database. > > > > =3D=3D > > begin work; > > set lock mode to wait; > > > > up…
Re: Tunning.
From: jhernandez@geuropa.com (Juan Manuel Hernandez del Olmo) > >Tunning ??? Tuning. >Thank you. Pleasure. How about telling us what hardware / os / application you're running. Without a context, everything I say below is bullshit. Actually, even with a context... :-) ># Dis…
Help optimizing query (newbie)
Hi. I am trying to run the following statements on a rather huge database. == begin work; set lock mode to wait; update tracked_ids set chk_count=-1 where image_id in (select image_id[16,26] from image_ids); delete from image_ids where image_id[16,26] in (select image_id fr…
Re: Indexing
John: The optimizer is a cost based optimizer and the order of items in the query will not matter unless you use optimizer directives. Now if the filter created by "a=? and b=? and c=? is not very selective, and the optimizer estimates that a large number of rows will be returne…
PDQ & WorkGroup Server 7.3 UC5
Does anyone know if PDQ works in Workgroup server? I cant seem to get more than one thread for a query which uses an index that is fragmented over 3 dbspaces. I have read that PDQ will only generate 1 thread on early versions of WG, but thought that this had changed in 7.3. on…
SQL performance
Shaun Campbell wrote: > > I have a query regarding something we have noticed using New Era and > wondered whether it a bug in New Era or is related to the database. > > In New Era we have been preparing SQL Select statements with ? > placeholders so that we could use the same pre…
Problems starting IDS 7.30.TC7 on Windows NT SP4.
When i try to start informix dynamic Server, the following message appears "Only informix user can start informix dynamic server" this message appears when i logged on with the informix's user. When i try to start the service on the control panel , error 2140 appears.…
RE: Sleeping scan threads
Hi Phil, A couple of people have suggested the patch and I'll give that a shot and hope it helps. The situation I've run into certainly jibes with what other people have experienced and fixed with the patch. Thanks to everyone for their help, Chuck > There is a new patch o…
RE: Sleeping scan threads
This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01BEA907.5108B846 Content-Type: text/plain; charset="iso-8859-1" There is a new patch out from HP you might want to t…
Sleeping scan threads
Hello, Looking for some general reasons on what would cause scan threads to sleep for lengthy amounts of time when there's no bottleneck on disk, memory or CPU. HP V2250, IDS 7.30.FC3, HP-UX 11, 5 CPUs, 8GB RAM (5 allocated to IDS), RAID-5 devices that are allegedly well-tuned …
7.30UC2 - Subquery uses Autodindex instead of Index
Richard Peterson wrote: > > Hello, > > I have this problem after upgrading a server from 7.20 to 7.30UC2. The > optimizer appears to process subquerys diffrently when the in clause is > used. Rather than using the index on the table used in the subquery it uses > an autoindex ins…
Out of buffer?
Hi, I got the following error message from an Informix IDS 7.30: <<Informix Dynamic Server>>> WARNING! Buffer pool size may cause Dynamic Server to get into a locked state. Recommended minimum buffer pool size is 4 times maximum concurrent user thre…
Correlated subquery
Hi All, Is the following select stmt a correlated subquery:- In page:4-31 of "Informix Performance guide - Version 9.1 " it is mentioned as correlated subquery. select item from a where item in (select item from b where …
Linux VS NT4.0
Hi, Is it true that Informix Dynamic Server workgroup edition 7.30 is ported for Linux, and if it is so does anyone can tell me what to chose between Linux and NT4.0 for running Informix Dynamic Server workgroup edition 7.30. Also I'd like to know for which version of Linux, Inf…
Re: config of online
Art S. Kagel wrote: > > Marichamy, Udaykumar wrote: > > > > In fact, I would be interested in the answer very much. A complete list of > > all Informix config params indicating which ones can be tuned dynamically, > > which ones cannot, will be extremely helpful indeed. Any one?…
seq scan counts
Chris Burton wrote: > > I have been running the following: > > select first 20 dbsname, tabname, seqscans > from sysptprof > where seqscans > 0 > order by 3 desc; > > AIX 4.2.1 > IDS 7.30.UC7-1 > F50 machine > > One of my larger tables is showing a large number of sequential scan…
Re: Checkpoints - a mystery
Sean Kelsey wrote: > > Sorry if I have already posted this once already...we are having problems > with our news server... > > HP-UX 10.20 running IDS 7.24.UC5 > > We have been having isolated problems with checkpoints - see below. During > the lengthy checkpoints, obviously no u…
Re: INFORMIX and utilization of system resources on HP-UX 10.20
Andrzej, It seems to me that you are using Baan. If that's so, you should check the following: 1. Use multiplexing. It will help a lot. Really. (you need porting set 6.1b.04 or later, check inf_maint6.1 -v) 2. Set LRU_MAX_DIRTY and LRU_MIN_DIRTY to 2 and 1 (Baan sugest those val…
Re: Create index very slow
Aww don't take advice from a clown. Especially this one. (only if he's drunk can you trust him ;-) Seriously, does MAX_PDQPRIORITY follow standard UNIX conventions? The lower the number, the higher the priority? Or should I give up sniffing glue? -Mikey Obnoxio The Clown wrote…
Re: PDQ
Art, I have PSORT_DBTEMP set to /tmp and that is implemented on physical memory, mounted on swap space.Make it, in this case sense to create mutiple directories, /tmp/psort1, /tmp/psort2,.. and set PSORT_DBTEMP to them. I create four indexes in parallel. Does it speeds up to gi…
RE: PDQ
You want to be careful about dumping huge amounts of data down to /tmp if it is really a memory filesystem. Remember they are major difference between a tmpfs and ufs/vxfs etc. I can bring our E10000 12CPU domain to standstill when generating .5GB file in /tmp Paul Watson …
PDQ
I noticed a performance decrease instead of a performance increase when using PDQ with creating indexes. The create indexes are done one/with: * Informix 7.23.UC6 on Solaria 2.5.1. * System: SUN E4000 with 6 CPU's and 5.3 GB internal memory. * Informix has four CPU, NO…
RESIDENT and PDQ
Can anyone explain what resident = 1 means and what the advantage of setting it is ? More performance ??? What effect does the PDQ-Parameters have ? GREETINGS OLAF…
RE: PDQ
PDQ makes a BIG difference on my sysytems when building indexes. > ---------- > From: Sadagopan, Sathish, CFCTR[SMTP:sadagop0458@att.com] > Sent: Monday, March 22, 1999 10:06 AM > To: informix-list@iiug.org > Subject: RE: PDQ > > The number of scan threads to be used durin…
Re: Re[2]: PDQ
> PDQ has nothing to do with index creation. You can not optimize these kind > of tasks with PDQ resources. Performance degration during index creation > is a consequence of allacation of PDQ resources that is supposed to used > by that process. Actually, PDQ has everything to d…
RE: PDQ
The number of scan threads to be used during the index build and the amount of memory used are affected by PDQ parameters,Aren't they ? Sathish Sadagopan -----Original Message----- From: Yerli, Gursoy [mailto:gursoy.yerli@tmssc.brooks.af.mil] Sent: Monday, March 22, 1999 9:53 A…
RE: PDQ
Albert, PDQ has nothing to do with index creation. You can not optimize these kind of tasks with PDQ resources. Performance degration during index creation is a consequence of allacation of PDQ resources that is supposed to used by that process. You can de-allocate PDQ resource…
Re: PDQ
From: wisse <wisse@kabelfoon.nl> > >I noticed a performance decrease instead of a performance increase when >using PDQ with creating indexes. > >The create indexes are done one/with: > > * Informix 7.23.UC6 on Solaria 2.5.1. > * System: SUN E4000 with 6 CPU's and 5.3 GB inter…
Starting Informix Dynamic Server !
Hi Gurus, Just wondering is there any difference in starting the informix engine as root user versus as Informix user. ? The reason why I ask this question is , the IDS 7.23 UC6 on HP-UX 10.2 crashes due to a bug (declared as bug by Informix Technical support)when we start in…
Informix Dynamic Server Archive/Restore
Hello All: We have a large scale Informix DB resident on an HP 9000, K460, with AutoRaid Disk Subsystem (218gb). And we are running IDS 7.30. Currently, we are using the Informix ontape archive/restore utility to archive the DB and to perform continuous logical logging. We u…
Re: Severe Performance Problem - Infomix 7.3 WGS & HPUX 10.20
eric wrote: > > We're in the process of upgrading from Informix 5 to Informix 7.3 Workgroup > Server but are experiencing severe performance problems. Some programs > which used to take 5 hours to complete are now taking 19 hours, on identical > hardware with identical indexing …
Any one know this?
Hi folks: Is there a script that can check informix on-line dynamic server is up and running or not? If not it will e-mail a note to D.B.A. groups Thanks in advance Garry…
Re: anyway to optimize this query?
>query only. Well, then, why not create all possible index combinations? :-) >Obnoxio The Clown wrote: > >> Sometimes it helps to treat a 2 CPU box as a single CPU box. Have you >> tried this? >> >> >PHYSBUFF 32 # Physical log buffer size (Kbytes) >> >LOGBUF…
Re: anyway to optimize this query?
query only. Obnoxio The Clown wrote: > >let's see... > > > >there are 61772773 rows in the table. > > > >The table is indexed on three fields, let's call it f1,f2,f3, it is a > >composite index, the reason I do that is because > >there is also a where clause in the query which…
Re: anyway to optimize this query?
>let's see... > >there are 61772773 rows in the table. > >The table is indexed on three fields, let's call it f1,f2,f3, it is a >composite index, the reason I do that is because >there is also a where clause in the query which uses all three fields as >criterias. > >update satis…
Re: anyway to optimize this query?
let's see... there are 61772773 rows in the table. The table is indexed on three fields, let's call it f1,f2,f3, it is a composite index, the reason I do that is because there is also a where clause in the query which uses all three fields as criterias. update satistics was p…
Re: anyway to optimize this query?
>hi all: > I have a 16 gig database, each record is contains 50 fields. > I am running a query like this: > > select f1,f2....f15, sum(f40),sum(f41),sum(f42), sumf(43) > group by f1,f2...f15 > > as you see, i have to group about 15 fields and sum 4 other fields >ba…
anyway to optimize this query?
hi all: I have a 16 gig database, each record is contains 50 fields. I am running a query like this: select f1,f2....f15, sum(f40),sum(f41),sum(f42), sumf(43) group by f1,f2...f15 as you see, i have to group about 15 fields and sum 4 other fields based on th…
Re: Buffer Waits
> hmm, could you go into a bit detail on the light-scan? I have a DSS system > but I am not sure how to make it use light scan. I read something on the > book about it, but it wasn't very clear on exactly how to utilize it or > how to check it. thanks yan Here's some more inform…
Performance Tuning
Well, the first thing to do is to determine what your performance goals are, then do a comprehensive audit on the current system (os, database and network) under load. The system or db parametes you change will depend heavily on where any performance goals are defecient. When…
converting Informix Online 5.1 esql/c to Dynamic Server esql/c?
Hi converting Informix Online 5.1 esql/c to Dynamic Server esql/c? What is the easiest way to do this? Is there a parser that could do this? edward…
RAID Technolgy
We are using Informix Online Dynamic Server 7.2. We are going in for a new DEC UNIX Server with RAID Technolgy. It incorporates mirroring at the hardware level. So is it not necessary to do mirroring using Informix?. Can anybody give suggestions regarding mirroring and other feat…
composite index question
Yan Zhu wrote: > > hi all: > If I put a composite index on three fields, a,b,c, what kind of > query would this benefit? > > I made a few queries with differenct criterias, and set explain on, > this is what I discovered. > 1. if the criteria is only on a or b or c, i…
Informix on Linux
Does anybody know how much a copy of Informix Dynamic Server would run me for use on Linux?? Thanks in advance -steve…
Upgrade Dynamic Server 7.13 - 7.24
I need to upgrade Informix Dynamic Server version 7.13 to version 7.24. Can anyone advise of any problems they may have had whilst doing this?…
Informix Dynamic Server 7.31?
Is any information available regarding the release of IDS 7.31 for Unix? We have Sun E3000 and E4000 machines and are experiencing problems with both 7.30.UC3 and 7.30.UC5 and are curious about 7.31. Thanks. Carleen Avant Naval Safety Center Internet < cavant@safecen.navy.mil …
STRING FUNCTIONS
Are there functions for manipulating varchar type, like upper() or lower() in Informix Online Dynamic Server 7.2? Thanks in advance.…
Re: Flushing Cache
Bryan Hughes wrote: > > Does anyone know a way to flush cache in Online 7.2x short of a) writing a > huge query, and b) cycling the engine? I am trying doing to query > optimization and need to do raw timing of the same query written in > different ways. Shut the engine down an…
Netscape Enterprise Connection for Informix Dynamic Server
Hi: Does anyone know the procedure for setting up a Netscape Enterprise Server to connect to an Informix Dynamic server on a remote machine? Michael…
oninit: shared library problem
I'm having problems when initialising the DB using oninit. Config: INFORMIX Dynamic Server Ver 7.23, on a UNISYS-UNIX SVR4. When Initializing, I get the error ...dynamic linker: oninit: symbol not found: gettimeofday The LD_LIBRARY_PATH is set to $INFORMIXDIR/bin and �INFORMIXDIR…
Initi DB
I'm having problems when initialising the DB. Config: INFORMIX Dynamic Server Ver 7.23, on a UNISYS-UNIX SVR4. When Initializing, I get the error ...dynamic linker: oninit: symbol not found: gettimeofday The LD_LIBRARY_PATH is set to $INFORMIXDIR/bin and �INFORMIXDIR/esql help wo…
Re: Problem with Informix 7.3 I need a good Idea very soon
Bundesarchiv wrote: > > E posibile > to mark a table (a priori) as "AVOID_FULL"(scan) ?? > > or (i.e. with UPDATE STATS) "near fullscan disabled" ?? > > (in Informix 7.3) > > I need a good Idea very soon See other posts. Also have you tried OPT_GOAL=0 which can be set in the ap…
Re: Problem with Informix 7.3 I need a good Idea very soon
Hi Klaus, in this case you will have to deal with the different levels of update-statistics, until you get what you want. Try to do "typical" queries after 'set explain on;' in dbaccess and try to figure out, why the optimizer takes a full-table-scan. hth martin Bundesarchiv sch…
Index on Informix Online 7.22 ?
I have installed a new Informix Online Dynamic Server 7.22UC3 on our server (HP-UX 10.20). I find it is much much slower than the Informix 7.12 Online DS server if I do not create index for a same program. Why and what is the difference between the two version of Dynamic serv…
Why Satan kills informix processes ?
I'm running Informix OnLine Dynamic Server 7.2 on Solaris 2.5 (sparc). After scanning this host with Satan all "online" processes become killed . I've found the following in $INFORMIXDIR/online.log : 15:05:39 Assert Failed: Internal Error - Segmentation Violation 15:05:39 Who…
Re: esqlvers statement.....results are different on 2 DB servers ???
Tim Jones wrote: > > I've installed Informix 7.30UC3 with the ClientSDK 2.01 software on 2 > servers. Let's call them Server A and B. > > Both A and B had a prior ESQL/C versions. > > After the install, logged in as informix userid on A and ran "esqlvers" > and got this : > I…
esqlvers statement.....results are different on 2 DB servers ???
I've installed Informix 7.30UC3 with the ClientSDK 2.01 software on 2 servers. Let's call them Server A and B. Both A and B had a prior ESQL/C versions. After the install, logged in as informix userid on A and ran "esqlvers" and got this : INFORMIX-ESQL Version 7.22.UC1 …
PDQ questions
Hi all. Some questions about de PQD. I have the above producs: Informix ODS Ver 7.24.UC2-1 Informix I4GL Ver 6.05.UD2 This products are running on some Sun platforms with Solaris 2.4 The questions are: a) The ODS Administration manual (Ver 7.2) say in chapter 18: "On…
Informix Dynamic Server Personal Edition
What development apps are known to work with IDS-PE for 95? Infrmx wants to sell me licenses for Dynamic 4gl, esql-c, ddvb for 150usd. Do these work and are there others? 150 sounds ok but the catch is is that the Open-Line Support is outrageous for this (3K usd for unlim. suppor…
Will informix 7.24.uc5 compatiable with solaris 7?
Hi there, I was wondering if Informix Dynamic Server 7.24.uc.5 will be compatiable with solaris 7 when it comes out? Thanks advance, Pat Militzer pmilitzer@ultracom.com…
Informix Online Dynamic Server 7.2.2
When I try to iniailize the shared memory I get an error "oninit: Critical error initializing shared memory" I checked the log and it says the base memory address is 0x80080000 and should be 0x80400000 when I change it it reverses. this is on a SCO open server 5. nay ideas.…
Informix Dynamic Server on Linux NOW!
Check out the Informix WEB Site. There is an announcement that IDS 7.3 is shipping on Linux TODAY! http://www.informix.com/ Art S. Kagel…
Problem installing to NT4.0 server
I'm trying to install Informix dynamic server workgroup edition to Primary domain Nt 4.0 Server. I have created Informix-Admin group and Informix account and grant it all Administrators rights and also Domain administrator rights. The server setup runs ok, but when setup is tryi…
Re: Distributions
Stefan Weideneder wrote: > > Jay Aymond wrote: [SNIP other stuff] > Do you think it's a good idea to give the optimizer detailled > informations for columns, if the information will not cause > a better query plan ? Don't you believe that it will slow down > those queries that d…
Re: Informix and RAID
Mickey Mestel wrote: > > craig, > > > Are there any whit-papers or other info on configuration of a data > > wharehouse and RAID? I will be configuring an 8.2 server and am > > considering hardware RAID over fragmentation. Any suggestions? > > i'm only going to touch on…
Re: Informix and RAID
craig, > Are there any whit-papers or other info on configuration of a data > wharehouse and RAID? I will be configuring an 8.2 server and am > considering hardware RAID over fragmentation. Any suggestions? i'm only going to touch on this, as it is a big subject, and will ne…
Deployment Licenses of Informix Dynamic Server
I need a free Deployment Licenses of Informix Dynamic Server!…
Re: Informix Dynamic Server blocks
In article <3609EB18.2AB1B1CD@bull.net>, Helmut Leininger <Helmut.Leininger@bull.net> writes >Hi, > >Sporadically, the Informix server seems to block (every try to connect >or onstat times out and no reaction on onmode -ky). In the MSGPATH I >find the following message: > >09:03:…
Informix Dynamic Server blocks
Hi, Sporadically, the Informix server seems to block (every try to connect or onstat times out and no reaction on onmode -ky). In the MSGPATH I find the following message: 09:03:42 mt.c, line 8362, thread 2139, proc id 17096, mt_notifyvp timed out. Informix server is 7.22.UC2…
Informix Dynamic Server blocks
Hi, Sporadically, the Informix server seems to block (every try to connect or onstat times out and no reaction on onmode -ky). In the MSGPATH I find the following message: 09:03:42 mt.c, line 8362, thread 2139, proc id 17096, mt_notifyvp timed out. Informix server is 7.22.UC2…
Re: DS 7.23 performance
Hi Niclas, first, read your Release Notes concerning the SHMBASE settings. You just have about 2000 BUFFERS, that is, 4MB of memory for your cache and about 8MB for the virtual segment. It must be possible to increase your cache. Your complete configuration file looks a bit as …
Re: SET EXPLAIN / SQL
Stefan Weideneder wrote: > > Hi David, > > as Sujit mentioned already, the results of SET EXPLAIN are > available as soon as you prepared your query. > This is not always true, but in most cases. > > If the query contains no question-mark "?", your query will > be optimized at th…
Re: 7.23 UC4 vs. 7.30 UC3
snip... > >> Also, Oyvind, we have experienced the wrong query path being selected by the > >> optimizer is 7.x for some time. We understand that 7.30 allows the user (us) > >> to control the query optimizer more directly. > > > >Yes, we have used this feature to verify that the …
Re: SET EXPLAIN / SQL
I am not sure but you can use Optimizer directives to select adhoc query plan. For more information about optimizer directives, you review the presentation slides about informix performance optimization by Kevin Fennimore on the following URL location (thank you Kevin). Good luck…
Re: Infromix & Data Warehousing Solutions
Doug Johnson wrote: > > Tim, > > Thanks for the info but we're not on the same page. I'm not talking about > the Informix query optimizer (access plan shown by 'explain plan'). There's > tons of info on www.informix.com on that optimizer. I'm talking about the > new MetaCube Ware…
Re: Infromix & Data Warehousing Solutions
Tim, Thanks for the info but we're not on the same page. I'm not talking about the Informix query optimizer (access plan shown by 'explain plan'). There's tons of info on www.informix.com on that optimizer. I'm talking about the new MetaCube Warehouse Optimizer. My understanding…
Re: Performance problem after merging db server
In article <6q4ft3$not$1@news02.btx.dtag.de>, Stephan Stresing <triple- p.sst@t-online.de> writes >Hi, >we have a heavy performance problem after 'merging' two db systems >to one. We did this because according to the Informix Performance guide >and the advices of Informix experts…
Re: OnLine Dynamic Server 7.2 Vs INFORMIX Dynamic Server 7.3
On Tue, 28 Jul 1998 14:40:44 -0500, Ben Jazi <bjazi@fallschurch.esys.com> wrote: >What are the major differences between INFORMIX-OnLine Dynamic Server >7.2 and INFORMIX Dynamic Server 7.3? Is it ORDBMS vs RDMBS? No, IDS 9.x is the ORDBMS. This autumn the 7.3 and 9.x code lin…
Re: OnLine Dynamic Server 7.2 Vs INFORMIX Dynamic Server 7.3
Ben Jazi wrote: > > What are the major differences between INFORMIX-OnLine Dynamic Server > 7.2 and INFORMIX Dynamic Server 7.3? Is it ORDBMS vs RDMBS? > > Thanks, > Ben I don't know the differences in detail but you could check the following pages, where IDS 7.3 is described …
OnLine Dynamic Server 7.2 Vs INFORMIX Dynamic Server 7.3
What are the major differences between INFORMIX-OnLine Dynamic Server 7.2 and INFORMIX Dynamic Server 7.3? Is it ORDBMS vs RDMBS? Thanks, Ben…
Informix computer Base classes
Has any body used the Informix computer base training classes. I am wondering if any of the computer based training classes: "Informix Dynamic Server System Administration" or the "Managing and Optimizing Informix Dynamic Server Databases" is good. Thank You…
Re: Informix Online Dynamic Server 7 on Linux
Piet le Roux wrote: > > If anyone has succeeded to run Informix ODS 7 (SCO) on Linux help would > be appreciated. > I have installed iBCS and the shared libraries and the binaries work, > except that the engine cannot initialize shared memory: Error message > semctl: errno 22…
Informix Online Dynamic Server 7 on Linux
If anyone has succeeded to run Informix ODS 7 (SCO) on Linux help would be appreciated. I have installed iBCS and the shared libraries and the binaries work, except that the engine cannot initialize shared memory: Error message semctl: errno 22 create_vp: cannot allocat m…
Problems with Informix Dynamic Server for NT
Hi Has anyone tried downloading and running the dynamic server product for NT? I have it installed, but get the following error when I boot the system: AdmAgent.exe - Applicatioin error The instruction at "0x10087c69 referenced memory at "0x00000000". The memory could not be r…
RE: What are the differences between Informix Dynamic Server
It is confusing! =20 Here's what I know: Prior to renaming: 7.2x =3D ODS 8.0 =3D XPS 9.1 =3D IUS After renaming: 7.2x =3D IDS 8.0 =3D IDS/AD/XP 9.1 =3D IDS/UDO=20 After the 7.3 release: 7.3 =3D IDS 9.1 =3D IDS/UDO After the 8.2 release: 8.0 =3D…
RE: What are the differences between Informix Dynamic Server and
This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------ =_NextPart_001_01BDA3AF.9242A58C Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Good quest…
Re: query optimizator
>Something strange happened to me (is not the first time) with >Informix OnLine 7.2 on UnixWare 2.1.1 with dual Pentium 133. >A query that we use frequently, suddendly stopped working. >The query optimizer decided to change something, and the query now >do not use anymore the rig…
People Soft and Informix 7.2
Informix DSA 7.2 Platform: Sun SPARC SunOS 5.5.1 4 CPUs Has anyone found it advantages to turn PDQ on with PeopleSoft version 7.01? TIA Cheryl L. Kendricks Sr. Database Analyst H.E. Butts Grocery San Antonio, Texas…
Re: query optimizator
Marco Traini wrote: > > Something strange happened to me (is not the first time) with > Informix OnLine 7.2 on UnixWare 2.1.1 with dual Pentium 133. > A query that we use frequently, suddendly stopped working. > The query optimizer decided to change something, and the query now >…
query optimizator
Something strange happened to me (is not the first time) with Informix OnLine 7.2 on UnixWare 2.1.1 with dual Pentium 133. A query that we use frequently, suddendly stopped working. The query optimizer decided to change something, and the query now do not use anymore the right in…
Re: Index for Informix Dynamic Server
William Lai wrote: > > Hello, > > We alreay upgrade our database server from SE5.X to IDS 7.3. After we > convert all the old data to the new server, we have some problems on the > index search. For example, a table: > > table : ith ( ithitno, ithname ), total 1,500,000 records…
Re: Index for Informix Dynamic Server
William Lai <rwie@netvigator.com> offerred: +We alreay upgrade our database server from SE5.X to IDS 7.3. After we +convert all the old data to the new server, we have some problems on the +index search. For example, a table: + +table : ith ( ithitno, ithname ), total 1,500,000…
Index for Informix Dynamic Server
Hello, We alreay upgrade our database server from SE5.X to IDS 7.3. After we convert all the old data to the new server, we have some problems on the index search. For example, a table: table : ith ( ithitno, ithname ), total 1,500,000 records index : ith_1 on ithitno, ithn…
Informix Dynamic Server 7.3
Hello, Since I'm planning a Data Warehouse, I would to do it with the new version of Dynamic Server. Impressions, stability and on which platform? Regards. Fernando _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Fernando Collalti Phone: +…
Re: I can't think of the subject name (have not words).
David Kosenko wrote: > "Art S. Kagel" <kagel@bloomberg.net> offerred: > +> > An annoyed Informix user wrote: > +> Do You see index3 on table1(field1, field2)? There isn't sorting > needed. > +WRONG WRONG WRONG! > +> There isn't table reading needed too. index3 contains all > …
Re: I can't think of the subject name (have not words).
"Art S. Kagel" <kagel@bloomberg.net> offerred: +> > An annoyed Informix user wrote: +> Do You see index3 on table1(field1, field2)? There isn't sorting needed. + +WRONG WRONG WRONG! + +> There isn't table reading needed too. index3 contains all information +> queried and in righ…
Informix PDQ & PeopSoft
We are running peopleSoft Finanacials and Informix Dynamic Server 7.2x. In IDS 7.2x, you can no longer turn on PDQ at the instance level, so we are trying to turn on PDQ at the environment level for our batched reporting jobs. Since all of our PeopleSoft users are untimate…
Re: Data binding
"Art S. Kagel" <kagel@bloomberg.com> offerred: +Yes. Versions before 7.3 resolved the query path at PREPARE time so, +except for an EXECUTE IMMEDIATE (which prepares and executes at the +same time), these two queries MUST be treated differently. Since the +actual value of the…
Informix PDQ & PeoplSoft Financials
I�m an Informix DBA, and we are running PeopSoft Financials 6.x and Informix Dynamic Server 7.2. I would like to turn on Informix�s PDQ feature to speed up some of our nightly batch jobs, but to do so, I need to set the PDQPRIORITY environment variable. Since all of our users…
PDQPRIORITY AND PSORT_NPROCS: How do they work together
Hi all, IF you set PDQPRIORITY AND PSORT_NPROCS for a query, how do they work in conjunction with each other ?If there are multiple scan threads working at a time, do all of the have the same PDQPRIORITY ? Does it actually help setting both the parameters, or do they counter…
Re: Optimizing a select query
Sujata, Try creating the following index on tab2 (col2, col1). This way it will only need to do an index read. Also run update statistics high (if SQL/Server has the concept). Regards David Ashby ______________________________ Reply Separator _…
Optimizing a select query
Hi everyone, Here is a question for you guys. I am facing a problem with a simple select query running toooo slow. Before I proceed, let me explain that I am facing this problem in SQL Server not in Informix. I know the die-hard Informix fans will say "Well... there is your a…
Informix Dynamic Server & Text columns
Hi everybody, Can you help me ? I've created a table with the following structure : column type -------- ---- code smallint obs text How can I insert into this table with Java program ? I'm using Informix Java AP…
Re: Optimizing..
A couple of clarifying questions: This limit of threads per CPU VP, is it a maximum limit of all queries, so that if the limit is hit, new queries are blocked, or is it a limit per query, so that only large queries are effected (big join/order/group by could use 30 threads but o…
Intermittent Problem - error 529 Cannot attach to transaction
We have a HP-UX box (Ver 10.20) running Informix Online Dynamic Server Ver 7.13 and a NT Server (NT4.0) running Informix Online Dynamic Server Ver 7.23. We are trying to access some of the database tables resided in the HP-UX box from the NT Server via synonyms. But we faced inte…
Re: Optimizing..
In article <6gc0fc$qe1$1@news.xmission.com>, "ABEL ROJAS GARCIA" <abelrg@bital.com.mx> writes: > > Hi, > > What can I do for Optimizing queries? > > > Thanks How about giving an example of query you'd like optimized.…
Re: Optimizing..
Go to the Informix Advanced Development and OnLine Administration classes. They're a definite investment. Either that or do some SERIOUS reading. Vij. ABEL ROJAS GARCIA wrote in message <6gc0fc$qe1$1@news.xmission.com>... > >Hi, > >What can I do for Optimizing queries? > > >Th…
Optimizing..
Hi, What can I do for Optimizing queries? Thanks…
Metacube & PDQ
When a user logs into Metacube several queries are run to verify a valid user and download table and filter definitions. Because of our configuration file PDQPRIORITY setting (90) these queries are considered under the domain of the Memory Grant Manager (MGM). This is ok except…
Re: Sysmaster Corruption
Bryan Hughes wrote: > > Lori, > > We have two 3.5 TB Informix ODS 7.24 UC1 databases on two SUN Enterprise > 6000's with 12 CPUs, and 8 GB of memory (soon to grow up into a pair of > E10000's) running Solaris 2.5.1 and have not experience any problems with > corruption of the sys…
Re: Onconfig Question
Barry asks: >I sent this a few weeks ago and didn't get any responses. I am >rephrasing the heading and trying again. One reason you might not hear back a lot on this topic is because consultants get about US$2,000 per day to answer this kind of thing. It's not in their best i…
Re: Onconfig Question
In article <6ebhun$stu@camel12.mindspring.com>, Barry Leb <barryleb@atl.mindspring.com> writes >I sent this a few weeks ago and didn't get any responses. I am >rephrasing the heading and trying again. > >We are not currently having any performance problems, but I am >interested …
Re: Update statistics of the informix.xxx tables.
>Is the update statistics scenario of the informix.systables alike tables >of a database the same as for the users tables. ? For the most part the access to these tables use a "fixed plan". Since this information is mainly needed by the optimizer to generate the query plan, we …
Re: ??? Opinions on ONCOFIG settings
Barry Leb wrote: > > We are not currently having any performance problems, but I am > interested in hearing some opinions from the experts out here. > > One of our systems is as follows: > > Sun SPARCcenter 2000E, Solaris 2.6, Veritas VM2.4 > 6 SPARCstorage Arrays 100's populated…
How can I read the header tape of the archive created by ontape?
I have Informix Dynamic Server 7.23.UC1. I would like know the tape header structure created by ontape.…
Re: Prepare a Statement that uses a temporary table?
Georg Winkens wrote: > > Is there a way in ESQL/C to prepare a Statement that uses a temporary > table (e.g. "Select * from Temp_Table ...") if this temporary table is > not already created at prepare time? No there is not. The purpose of preparing a statement is to save the co…
Re: Detached indices in 7.3
David Williams wrote: . . . snip . . . > > > >I saw that right after we installed it on our test system. Yes, they > >need to change the dictionary tool, but they don't see the need to do > >so; that's one reason why I do all of my maintenance in Informix. It's > Nope! If …
Re: Optimizer Info
>Are there any ways to know how the optimizer is evaluating all the >possible query plans and how it decides which one it chooses. > >I know about 'set explain' and data distributions and such, but is there >a way to see the process >the optimizer went through. Basically, no. T…
Optimizer Info
I am running 7.1 on Solaris 2.5 (soon to be upgrading to 7.24). Are there any ways to know how the optimizer is evaluating all the possible query plans and how it decides which one it chooses. I know about 'set explain' and data distributions and such, but is there a way to see…
Re: Query Optimizer
>Help me please! >I need information about algorithm of Query Optimizer. >Informix Engine - OnLine Dynamic Server 7.10 One can write a book on this topic. Basically, the optimizer looks at all possible ways of scanning every table in a query. The cost for each path is calculated…
Query Optimizer
Help me please! I need information about algorithm of Query Optimizer. Informix Engine - OnLine Dynamic Server 7.10 .…
Re: Poll Threads
In article <6anilu$b75$1@news.xmission.com>, Harold Luse <hluse@vth.colostate.edu> writes > > >I have a question about poll threads that some of the gurus may be able to >answer. > >We are starting to use our first multi-processor machine (specifics below) >and I don't see any ev…
Re: Upgrading Informix from Online engine to Dynamic Server
Seth Grimes wrote: > > Jane Vohden wrote: > > > > I have been talking with Informix about upgrading our site from the > > 5.xx Online engine to 7.2x Dynamic Server. They said there was no cost > > I don't think that anyone has pointed out the mistaken terminology > h…
Re: Performance question
In article <01bcf053$bbb14500$57011814@willie>, "Willie L. Meeks" <wmeeks@harrahs.com> writes >I apologize for not sending the onconfig parameters. > >SHMTOTAL 768000 >SHMVIRTSIZE 348000 >DS_TOTAL_MEMORY 614000 >DS_MAX_SCANS 1000 >MAX_PDQPRIORITY 60 >DS_M…
Re: Performance question
I apologize for not sending the onconfig parameters. SHMTOTAL 768000 SHMVIRTSIZE 348000 DS_TOTAL_MEMORY 614000 DS_MAX_SCANS 1000 MAX_PDQPRIORITY 60 DS_MAX_QUERIES 8 OPTCOMPIND 2 Willie L. Meeks <wmeeks@harrahs.com> wrote in article <01bcefc3$7f535480$57011814@willie>... > I ha…
What's the difference between ODS 7.22 and 7.23?
What's the difference between Informix Online Dynamic Server version 7.22 and version 7.23? Thanks in advance. Bill Westphal Rodney District Council mis@rodney.govt.nz…
Re: Update statistics bug
Vickey - Looks like this query is a PDQ (Parallel Data Query) job. The 'sqlexec thread is sort of a parent thread; that's the controller and coordinator of the job, and what communicates with the user or front end. The 'scan_5.0' and 'scan_6.0' threads are (as their name impli…
ODBC unix and dynamic SQL
Hi, Can someone give me some help on using informix odbc drivers (unix) with dynamic SQL on Informix-online dynamic server (7.22 unix) when I use "SQLprepare" I receive the message "too many or too few host variables given" but I think all is Ok R. Gueye…
Re: DELETE does not use index
>Sorry for my stupid question, but what does UPDATE STATISTICS do in detail? No such thing as a stupid question. UPDATE STATSTICS updates information in the database catalogue, such as systables, sysindexes, sysdistributions. Information from these catalogue tables is read by …
Re: Stored Procedures and querries.
From "Incorporating Stored Procedures and Triggers into Your Informix Databases Training Manual" Version 01-95 Page 6-128: When a stored procedure is created all optimization will be attempted at that time. If the tables cannot be examined at compile time (they may not exist o…
Re: Running UPDATE STATISTICS on a table being used
sujata_soman_at_omm-la2-infotech-001@internet.omm.com wrote: > Since the update statistics was going on parallelly with the query, will the > query use the new plan once the update statistics is over or does it still go > with the old plan ?? The query is just taking for eve…
Re: Performance question
Try increasing the DS_TOTAL_MEMORY to a bigger number , depending on your queries , assign 50 or 100 MB and see the difference. Willie L. Meeks wrote in message <01bcefc3$7f535480$57011814@willie>... >I have a question related to PDQ. Can any one explain to me why when you >run…
Re: Performance question
Willie L. Meeks wrote: > > I have a question related to PDQ. Can any one explain to me why when you > run a query with PDQ enabled it appears that your cpu vp's don't work as > hard. PDQ will only buy you much of anything if you have your data fragmented. Have you taken a look…
Performance question
I have a question related to PDQ. Can any one explain to me why when you run a query with PDQ enabled it appears that your cpu vp's don't work as hard. It appears to me from the results I have observed from my DSS system that if I excute 50 without PDQ enabled the box works har…
Re: Set explain use
>Not considering indexes, does it make any difference to the informix >optimizer > if we switch the order of conditions in a where clause. For example, which >one > is better: > >select * from A where p = q and r = s or >select * from A where r = s and p = q . > >None of p,q,r,…
optimizing - sqexplain
Hi, We are developing an application with New Era 2.20 using Online 7.10 (about to upgrade to 7.23). My goal is to optimize the response times and I'm new in that function. The first idea is to search through the access plan for high cost queries, the problem is that I don't kn…
Re: Query Optimizer
Dies ist eine mehrteilige Nachricht im MIME-Format. --------------7BAFAD1E691FD235D6CAD43F Content-Type: text/plain; charset=iso-8859-1 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Content-Transfer-Encoding: 8bit Hello Mauro, but there still exis…
Re: Query Optimizer
Mauro G. Pisano wrote: > > HI all: I recently heard about the possibility of upgrade de query optimizer. > I 've got ON-LINE 5.0 and at Informix Seminary, It was listened taht by > upgradin only the query optimizer, somes exposed queries at the seminary, > had down its times fro…
Query Optimizer
HI all: I recently heard about the possibility of upgrade de query optimizer. I 've got ON-LINE 5.0 and at Informix Seminary, It was listened taht by upgradin only the query optimizer, somes exposed queries at the seminary, had down its times from 30 minutes to seconds. I want …
Re: detached index vs attached index
>Greeting... > >Can anyone comment on detached index vs attached index? Thanks in >advance! > >Andy Chang At one time, Informix often made an issue about the fact that the indexes were attached. By attached, we mean that the index is actually contained in the same partition (t…
Next Extent Calc.
Hi, I have INFORMIX-OnLine Dynamic Server Version 7.14.UD2. Does anyone know of a script or program to calculate the next extent size ? Thanks in advance Manuel…
PDQ Not working
Greatings, I just received DSA 7.22.UC2 on HP-UX 10.20, and am unable to get it to satisfy a Query using PDQ. When I run the same query with 7.11, it works fine. The output of 'onstat -g mgm' shows that no querys have run with PDQ on the 7.22 engine. PDQPRIORITY is set at 30,…
Re: Disk Layout
Mark - Do I read this right to say you fragmented a table over three dbspaces *on the same disk* and got tripleish the performance compared to one dbspace? That's amazing. It seems like the three threads concurrently reading the same disk should bounce the heads all over the…
Ques. on adding constraints as opposed to indexes
hi all, i've just run into a situation where i wanted to drop the indexes and do large deletes on a big table, and then rebuild the indexes. so far so good for my first index, it ran pretty fast. but my other three indexes are in the form of constraints, and these run for ho…
Re: First N records in SELECT
Slavik Anosov wrote: > > Does anybody know something in Informix ODS 7.1 that perform functions of > Oracle's ROWNUM pseudo-column? I need to retrieve only first N records in > select. > No, there is no such feature. Assuming that you are using ESQL-C or 4GL you can simply close…
Re: Query Optimization question
Ignatius In version 7.x (not in 5.x) you can do: UPDATE STATISTICS MEDIUM FOR table(column) DISTRIBUTIONS ONLY The MEDIUM will do data sampling whether or not you create an index on the column. The DISTRIBUTIONS ONLY update the sysdistrib table in your database. In case you …
Re: Query Optimization question
On Thu, 10 Jul 1997, Ignatius Cristina Michelle wrote: > Hi. > > What statistical information can Informix draw upon to determine how > many rows will be satisified by a query coondition of the form "column = > value", for example, "department = 'D'" where "department" may or ma…
Query Optimization question
Hi. What statistical information can Informix draw upon to determine how many rows will be satisified by a query coondition of the form "column = value", for example, "department = 'D'" where "department" may or may not be an "indexed" column. Where is this statistical informati…
Java and Informix Dynamic Server 7.x
Hi friends! I am trying to do server-side java cgi programming to connect to I-ODS 7.x. Do you know how I can do that? I heard it is possible to use the jdbc-odbc bridge( intersolve or openlink's), but the performance is too slow, because of jdbc to odbc and odbc to jdbc convert…
Re: Set explain utility
>The sqexplain.out file exists immediately after the prepare. >Please, try it again. How can this be? At the PREPARE stage (for any real-life query) crucial information - values to use - are still missing. It is only at OPEN CURSOR when we tell the engine the values, and only t…
Advantages of Dynamic Server 7 over Workgroup Server 7
I understand the main difference between Workgroup Server V7 and On-line Dynamic Server V7 is PDQ. I thought I heard somewhere WGS does not scale above 2 CPU's. Does anyone know of any other reasons for buying ODS over WGS ? Thanks in advance. Steve Gould…
Re: Checkpoint duration increase with 7.22.UC1
Hi David, CLEANERS are set to 80. Amount of KB to write during the checkpoint will be 6880 KB, must be appr. 6.5MB. I don't know anything about their disk layout. But if they have more than one chunk per disk and if they are using KAIO, then they risk parallel writing to one dis…
Re: Checkpoint duration increase with 7.22.UC1
In article <5lak28$ssn@cssun.mathcs.emory.edu>, Kernoal Stephens <kernoals@earthlink.net> writes >I recently upgraded from 7.13.UC2 to 7.22.UC1. > >With 7.13.UC2 my checkpoint duration was averaging 4.5 seconds. >I used the same onconfig settings with 7.22.UC1 and my average >che…
Re: Checkpoint duration increase with 7.22.UC1
In article <5kq94e$o4q@cssun.mathcs.emory.edu>, Kernoal Stephens <kernoals@earthlink.net> writes >I recently upgraded from 7.13.UC2 to 7.22.UC1. > >With 7.13.UC2 my checkpoint duration was averaging 4.5 seconds. >I used the same onconfig settings with 7.22.UC1 and my average >che…
Re: DSA follies
> Correct - hold cursor declared with hold are not parallelized... > Several other types 'queries' are not parallelized - can't remember > which... Wow, what a coincidence! I just read a page on this in the Performance Tuning Training manual. Queries NOT parallelized: * Th…
Re: Informix and PDQ
In article <5jue9j$p30$1@news7.gte.net>, Paul Drake <pdrake1@gte.net> writes > >> I assumed that since for most of our queries we see almost no speed >> increase from a setting of 5 to 40, we could run 20 queries at 5. Nope, >> no show. Informix recomends sending one query at a…
Re: Informix and PDQ
> I assumed that since for most of our queries we see almost no speed > increase from a setting of 5 to 40, we could run 20 queries at 5. Nope, > no show. Informix recomends sending one query at a time throught the > engine at PDQ 100. It seems that multiple queries really fre…
Re: NUMCPUVPS and Fragments
Since one scan thread tends to be associated with one fragment, I would (for maximum performance anyway) go with lots of fragments, and let the thread dispatching algorithm sort 'em out. If the threads aren't there, the work can't get done, so load em up I say... Remember, you…
NUMCPUVPS and Fragments
On page 2-11 of the Informix Performance Guide Manual (Ver. 7.2), it states that "queries perform best when the number of scan threads is a multiple (or factor) of the number of CPU VPs". It then gives the example of having 6 CPU VPs, and a table with 10 fragments, and suggestin…
Re: Informix and PDQ
Just a comment. I'd suggest that anyone that is thinking of starting to turn on PDQ initially simply set PDQ to 1. This will turn on parallel scanning for fragmented tables but will not cause programs to gate in the memory manager. In many cases, simply allowing parallel scann…
Informix and PDQ
( still trying to post to Usenet after all these weeks . . .) Hopefully, this message will get through . . . I am the DBA of a small Informix shop in Atlanta, GA. We have been operational under Informix 7.13.UC1 for well over a year. The system appears to be tuned well. I wou…
Re: OnLine 7.13 performance problems - comments please?
Ntruby@netcomuk.co.uk wrote: > > . .dra.com!feed1.news.erols.com!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com� > . !rill.news.pipex.net!pipex!netcom.net.uk!not-for-mail > From: Neil Truby <ntruby@netcomuk.co.uk> > .Newsgroups: comp.databases.informix > Subject: OnLine 7.13 perf…
Re: OnLine 7.13 performance problems - comments please?
Hi, Your output shows quite a few waits in several areas. One thing you can try if you can spare the resources is to change your lock level on database tables to row level locking (if not set there already). This will ease contention for the tables. Your read cache is about as …
Re: OnLine 7.13 performance problems - comments please?
Neil Truby wrote: } } We're running OnLine 7.13 under Solaris 2.4, on a Sparc 20 with 160M of } memory. The load is increasing, and the users are complaining about } performance. } } Here's my onstat -p in the 12 hours since I zeroed the stats: } } Profile } dskreads pagreads bu…
Access to Optimizer results
We are using version 7.2 on HP-UX 10.10, and would like to know if there is any way to access to "cost" (from the optimizer) of a query while the query is executing without having the explain plan written out to a dataset. We are trying to develop a quey govenor that can be used…
Re: understanding On-Line's Optimizer
Steve Romankiw wrote: > > I am new the Informix On-Line engine. I am looking for information on > On-Line v7.13 Cost Based Optimizer. We are migrating to Informix from > SQLBase and the optimizers work differently. In informix, we often get > sequential scans on queries that w…
Re: understanding On-Line's Optimizer
At 10:05 AM 19-12-96 -0500, you wrote: >I am new the Informix On-Line engine. I am looking for information on >On-Line v7.13 Cost Based Optimizer. We are migrating to Informix from >SQLBase and the optimizers work differently. In informix, we often get >sequential scans on que…
Re: understanding On-Line's Optimizer
sromankiw@execrisk.com (Steve Romankiw) wrote: :I am new the Informix On-Line engine. I am looking for information on :On-Line v7.13 Cost Based Optimizer. We are migrating to Informix from :SQLBase and the optimizers work differently. In informix, we often get :sequential sca…
Re: understanding On-Line's Optimizer
On 19 Dec 96 at 10:05, Steve Romankiw wrote: > I am new the Informix On-Line engine. I am looking for information on > On-Line v7.13 Cost Based Optimizer. We are migrating to Informix from > SQLBase and the optimizers work differently. In informix, we often get > sequential s…
understanding On-Line's Optimizer
I am new the Informix On-Line engine. I am looking for information on On-Line v7.13 Cost Based Optimizer. We are migrating to Informix from SQLBase and the optimizers work differently. In informix, we often get sequential scans on queries that we feel should be using an index.…
Re: Online V7 and Parallel Queries
> > Is it true that PDQ, parallel queries in OnLine V7.x will use both > primary chunks and mirror chunks to retrieve data concurrently when > performing a query expected to return large volumes of data??? > It is true Michael Strother…
NO RESPONSE FROM SERVER PROCESS
Montree Saengchannukul wrote: } } Help me,please !!!!! } I use INFORMIX V.7.2 on IBM RISC/6000,AIX V.4.1.4. } (memory 256 MB,2 cpu) } I have some problem: } When my user can't connect to database (through ODBC) he tells me. } And in that time I call "onstat -i" it…
Re: NO RESPONSE FROM SERVER PROCESS
Montree Saengchannukul wrote: } } Help me,please !!!!! } I use INFORMIX V.7.2 on IBM RISC/6000,AIX V.4.1.4. } (memory 256 MB,2 cpu) } I have some problem: } When my user can't connect to database (through ODBC) he tells me. } And in that time I call "onstat -i" it…
Re[2]: Multiple Residency / Multiple Processors
Thanks Kate, that gives me a starting point. Some others have expressed interest in what I find, so I'll post my results in a couple of months. ______________________________ Reply Separator _________________________________ Subject: Re: Multiple Residency / Mult…
Re: Multiple Residency / Multiple Processors
Each server sees the CPUs separate from the other configs, SO you can make all three environments (3) CPU machines. PDQ is a separate issue. You may want to turn off PDQ on the large machine, and turn it on for the other two, since PDQ jobs always have a lower priority than non…
Re: update stats resolution
Manoj Shroff wrote: > > Hi All, > > Does anyone have any guide lines for the use of the > resolution clause in "update statistics" ? Hi All, data distribution is an additional overhead for the optimizer. Therefore you should try to avoid data distributions whereever pos…
Re: Optimize A Simple Query -- Help
Chao Y. Din wrote: > > I have a simple select count statement that takes three minutes to > execute, yet I only have about 300,0000 rows. Here is the SQL. > > SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND col1 = 2010 > > Is it possible to force the query to …
Re: Optimize A Simple Query -- Help
Chao Y. Din wrote: > > I have a simple select count statement that takes three minutes to > execute, yet I only have about 300,0000 rows. Here is the SQL. > > SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND col1 = 2010 > AND col2 = 10; > [SNIP] > Is it possible…
Re: Optimize A Simple Query -- Help
At 08:29 AM 9/16/96 -0400, you wrote: }I have a simple select count statement that takes three minutes to }execute, yet I only have about 300,0000 rows. Here is the SQL. } } SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND col1 = 2010 }AND col2 = 10; } }The "key" field …
Re: Optimize A Simple Query -- Help
tvarnas@compulink.gr (Apostolos Varnas) wrote: :Chao Y. Din wrote: :} :} I have a simple select count statement that takes three minutes to :} execute, yet I only have about 300,0000 rows. Here is the SQL. :} :} SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND …
RE: Optimize A Simple Query -- Help
Chao Try creating an index on table (col1, col2, key). This should make the = optimizer utilize the index path. Also since col1 and col2 are highly = duplicate values, this will give the index some degree of uniquenss so = the optimizer finds it worth giving the new index a try.…
Re: Optimize A Simple Query -- Help
Chao Y. Din wrote: } } I have a simple select count statement that takes three minutes to } execute, yet I only have about 300,0000 rows. Here is the SQL. } } SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND col1 = 2010 } AND col2 = 10; } } The "key" field is th…
Re: Optimize A Simple Query -- Help
Chao - have you tried "update statistics medium..." or high...? That might induce the optimizer to choose the more discriminating index. If you're running "low", the optimizer is flying pretty blind when it comes to data distributions. Greg Chao Y. Din wrote: > > I have a s…
Optimize A Simple Query -- Help
I have a simple select count statement that takes three minutes to execute, yet I only have about 300,0000 rows. Here is the SQL. SELECT COUNT(*) FROM table WHERE key[1,7] = "B02800A" AND col1 = 2010 AND col2 = 10; The "key" field is the primary key with data type char(11). …
Re: Update Statistics Low, Medium & High
billy@west.co.za (Billy Wheeler) wrote: :> >In our system, we discover sometimes some tables in index searching is much :> >faster while we update their statistics low or medium instead of high. :> I heard a discussion the other day which indicated that when you update :> stati…
Re: Update Statistics Low, Medium & High
Clem Akins wrote: > > >In our system, we discover sometimes some tables in index searching is much > >faster while we update their statistics low or medium instead of high. > > > >We have an idea that update all tables high statistics with reference to the > >server admin. guide.…
Re: PDQ on 7.12
: }From: barryleb@atl.mindspring.com[SMTP:barryleb@atl.mindspring.com] : }Sent: Wednesday, August 07, 1996 3:20 PM : }To: informix-list@rmy.emory.edu : }Subject: Re: PDQ on 7.12 : } : }TASHKOP@kiwi.co.nz (Peter Tashkoff) wrote: : } : }>Morning all : }>We are considering enabl…
Re: PDQ on 7.12
>} >We are running 712UC2, on a dual proc. HP model K w/512MB RAM. What a >nightmare. PDQ is useless, and OPTCOMPIND is turned off. If we edit a >table structure while someone is in the table, we crash the database, How can you do this when someone is in the table, it should …
RE: PDQ on 7.12
}---------- }From: barryleb@atl.mindspring.com[SMTP:barryleb@atl.mindspring.com] }Sent: Wednesday, August 07, 1996 3:20 PM }To: informix-list@rmy.emory.edu }Subject: Re: PDQ on 7.12 } }TASHKOP@kiwi.co.nz (Peter Tashkoff) wrote: } }>Morning all }>We are considering enabling PD…
Re: PDQ on 7.12
TASHKOP@kiwi.co.nz (Peter Tashkoff) wrote: >Morning all >We are considering enabling PDQ on DSA >7.12/Solaris 2.4. >We had previously disabled this facility due to the >bug in 7.10 where it didn't handle the lower level >threads. >So... we are seeking comfort from people that mi…
PDQ on 7.12
Morning all We are considering enabling PDQ on DSA 7.12/Solaris 2.4. We had previously disabled this facility due to the bug in 7.10 where it didn't handle the lower level threads. So... we are seeking comfort from people that might already be running PDQ enabled over 7.12 or lat…
Informix Certified Professional Program Update
Informix offers two certification paths. Each path requires the successful completion of two exams. Each exam is US $250 and is between 60-90 minutes long. * Database Specialist for INFORMIX-OnLine Dynamic Server 7.x 111 - Database Fundamentals Exam 112 - Managin…
PDQ on 7.10 single processor engine - FYI
In my zeal to set up PDQ on my single proccess cpu machine to prepare for my multiple processor machine (yeah I got more then one machine to support) in a UNIX AIX 4.1.3 environment. I set the configuration values for PDQ even though I identified to the engine via the MULTIPROCE…
PDQ parameters in OnLine 7.11
Has anybody any experience with using PDQ in OnLine 7.11? I heard that sometimes they can give error -208 when running SQL queries. Moreover, on my platform (ICL Sparc server) the PDQ parameters put through "onmonitor" are incorrectly written in the $ONCONFIG file eg. the value …
Problem using PDQ with Online 7.1
Has anyone had any problems using PDQ and Online 7.1, especially with regard to the PDQ PRIORITY variable being ignored. i.e. all queries passing through the memory grant manager. Thanks in advance Brian Davies Lintel Software Consultancy Ltd, Chester, England.…
Set Explain with SP's
In attempting to determine how the optimizer is processing queries in stored procedures, we've tried turning 'set explain on' within a procedure. However, when executing the procedure, I get an empty file. Is there anything special which needs to be done, to get set explain outp…
Re: EXPLAIN result diff. in TEST and REALITY
: In our TEST DB the result of a joined query and SET EXPLAIN is INDEX PATH : for the two tables. On our REAL enviroment this result is for one table : is SEQUENTIAL SCAN, and for the other one is INDEX PATH. Is this normal ?? : The query is awful slow, maybe thatsway ?? Hi, am…
Re: INFORMIX-Online Dynamic Server intallation
copy the standard onconfig file and make as few changes as possible to the different parameters. after you are sure you can bring informix online, should you begin to make changes to the onconfig parameters. Use ONMONITOR to make the changes. It will protect you from many mista…
INFORMIX-Online Dynamic Server intallation
I'm about to install INFORMIX-Online Dynamic Server V.7.1 on a SPARC 1000. Has anyone installed this database on a sparc before? If yes...do you have any suggestions or could you give me any advice on certain aspects of the installation you felt might be important to take notice?…
Re: Distributed Join
>I remain very sceptical. To optimize a join across multiple vendor databases >requires that your 'joining' product must fully familiar with all >the individual optimizers in each database to understand how they will process >their portion of the query. Next it must be familiar…
about INDEX
Good day people, somebody could tell me which is the use of INDEX and one example. I think that with INDEX, I can to optimize my querys in 4gl, thanks in advanced. Atte. German Velazquez…
Re: OnLine Optimizer with compound indices??
Just a quick follow-up. This thread has been moving on with the assumption that "||" means "OR". Actually, it is Informix's concatenation operator. The best answer I've found to my original problem is to use a statement such as: SELECT A,B FROM table WHERE A >= "XXX" and A ||…
Re: Query Optimising Problem !!
Optimizing a query can be very quick once you type set explain on and then run your query. The output will tell you how the optimizer has decided to process your request: it will show you what indexes it uses, what filters and when it is doing a sequential read. It can be su…
Re: Query Optimizing Problem !!
In article <3i16po$c1s@raffles.technet.sg>, Alan Chen <sgs@technet.sg> wrote: >I have never done any query optimization practise in Informix Online >before, can anyone provide me some pointers ?? Any good reference book ?? >Any idea will be appreciated. > >Thanks in Advance. > >A…
Re: Optimizing Many-Table Joins
mmueller@calvin.bellahs.com (Michael Mueller RD) writes: >Can anyone tell me the tactics that the query optimizer uses for >optimizing joins, especially queries joining a large number (e.g. >4) >of tables? What is the max number of tables allowed in a query? >How does this comp…
Optimizing Many-Table Joins
Can anyone tell me the tactics that the query optimizer uses for optimizing joins, especially queries joining a large number (e.g. >4) of tables? What is the max number of tables allowed in a query? How does this compare to Sybase's handling? Thanks! --Michael mmueller@bella…
RE: Optimize Query for slow responce
> 26-Oct-1994 > >I can not understand the Informix Query Optimizer ! >--------------------------------------------------- > > >I have a fine large table and I create a query, where I select all fields from >the table. To lookup the records I have an unique index on a field…
Re: Optimize Query for slow responce
In article <38lia4$97d@emory.mathcs.emory.edu>, pp@q8.dk (Poul Pedersen) says: > > 26-Oct-1994 > >I can not understand the Informix Query Optimizer ! >--------------------------------------------------- > > >I have a …
Re: Optimize Query for slow responce
In article <38lia4$97d@emory.mathcs.emory.edu>, pp@q8.dk (Poul Pedersen) writes: |> Now look at the Optimizer Query Plan: |> |> |> QUERY: (LOW) |> ------ |> select * from ks_gdkonto |> where gd_kontonr = "0003573508" |> and gd_prod_kode < 90000 |> |> |> Estimated Cost: 2 |> Es…
RE: Optimize Query for slow responce
} 26-Oct-1994 } }I can not understand the Informix Query Optimizer ! }--------------------------------------------------- } } }I have a fine large table and I create a query, where I select all fields from }the table. To lookup the records I have an unique index on a field…
Optimize Query for slow responce
26-Oct-1994 I can not understand the Informix Query Optimizer ! --------------------------------------------------- I have a fine large table and I create a query, where I select all fields from the table. To lookup the records I have an unique index on a field called '…
Re: Query Optimizer
In article <dennisp.762623729@puma>, Dennis Pimple <dennisp@informix.com> wrote: >root@perk.jpr.com (Joseph A. Miele) writes: > > >>The following two queries QUERY 1 and QUERY 2 are the output of SET EXPLAIN >>ON. I do not understand why the query optimizer does a sequential sca…
Re: Query Optimizer
root@perk.jpr.com (Joseph A. Miele) writes: >The following two queries QUERY 1 and QUERY 2 are the output of SET EXPLAIN >ON. I do not understand why the query optimizer does a sequential scan on >root.alujobsh in QUERY 2. The only difference in the two queries are these >lines…
Query Optimizer
The following two queries QUERY 1 and QUERY 2 are the output of SET EXPLAIN ON. I do not understand why the query optimizer does a sequential scan on root.alujobsh in QUERY 2. The only difference in the two queries are these lines: QUERY 1: atkliquh.inv_num = '12316' and QUER…
Re: Optimizing queries info
Greg Sheppard (imop%uspfo.wa-ngnet.army.mil@wa-ngnet.army.mil) wrote: : We've recently written a couple of reports which take FOREVER (hours) : to run...and are getting very interested in streamlineing our queries : for speed and efficiency. Is there a book or useful info on ho…
Re: Optimizing queries info
}From: bt@irl3b2c.att.com }Date: Thu Dec 16 9:15:34 GMT 1993 }Subject: Optimizing queries info }X-Informix-List-Id: <list.3228> } }Greg Shepard wrote } }> We've recently written a couple of reports which take }>FOREVER (hours) to run...and are getting very interested in streamlin…
Re: Optimizing queries info
Greg, The best way to speed up queries is temp tables. If you use set explain on you might find informix is creating its own temp tables but not making good choices. You know you data better that the engine so you should be able to build better (smaller) temp tables. -- Greg …
Query Optimizer or Lack Thereof
Yet another example of a slooooooow query. This does get frustrating because there are too many times that a perfectly good query has to be split into parts (ie. temp tables) in order to get some decent access time. In the query described below, Does anybody have a clue as to …
Re: Optimizing queries info
> > > } > }I suggest that Jonathan Leffler's book - "Using Informix-Sql" [ISBN > }0-201-51240-8] is *required* reading if you want to do anything with isql. > > Thank you very much. > Well deserved I might add (the compliment - not the thanks). j. _____________________________…
Re: Optimizing queries info
}From: bt@irl3b2c.att.com }Date: Thu Dec 16 9:15:34 GMT 1993 }Subject: Optimizing queries info }X-Informix-List-Id: <list.3228> } }Greg Shepard wrote } }> We've recently written a couple of reports which take }>FOREVER (hours) to run...and are getting very interested in streamlin…
Re: Optimizing queries info
Greg Sheppard (imop%uspfo.wa-ngnet.army.mil@wa-ngnet.army.mil) wrote: : We've recently written a couple of reports which take FOREVER (hours) : to run...and are getting very interested in streamlineing our queries : for speed and efficiency. Is there a book or useful info on ho…
Optimizing queries info
Greg Shepard wrote > We've recently written a couple of reports which take >FOREVER (hours) to run...and are getting very interested in streamlineing >our queries for speed and efficiency. Is there a book or useful info on >how best to get the quickest results with queries using…
Optimizing queries info
We've recently written a couple of reports which take FOREVER (hours) to run...and are getting very interested in streamlineing our queries for speed and efficiency. Is there a book or useful info on how best to get the quickest results with queries using iSQL? Or is it just a…
Re: Query Optimiser
John B writes: |Has anyone noticed the 5.X optimizer making bad choices when |choosing a query plan? choosing a query plan? In my case the |optimizer insists in performing a sequential read of a detail table |ignoring the unique index used to join to the master. Performance, …
Query optimizer in 5.01 Informix
Has anyone noticed the 5.X optimizer making bad choices when choosing a query plan? In my case the optimizer insists in performing a sequential read of a detail table ignoring the unique index used to join to the master. Performance, as you can imagine is very, very poor. Infor…
Informix query optimizer info please
I am looking for detailed information on how the Informix query optimizer operates (i.e. makes its decisions, what it looks for, good tips on how to formulate tricky queries, etc.) I have a reasonable amount of experience in the land of Sybase, but I'm new to Informix. After I …
Re: SQL query
Bob Baskett writes: |netters, |can someone explain why the optimizer doesnt short circuit on the |following query: | QUERY: | ------ | select * | from book_bill_back | where 1=2 | Estimated Cost: 370832 | Estimated # of Rows…
False queries and optimizer
Is there any way to slip fake queries past the online5 optimizer? E.g., select * from foo where field1=42 works fine, uses the index on field1, while select * from foo where 1=0 or field1=42 has the optimzer doing a sequential scan on all of foo... (As for "why do I care", I…
Informix Online 5.0 Query Optimizer
We have a problem concerning Informix Online 5.0 query optimization. Informix seems to be choosing extremely inefficient paths for no apparent reason. The part_ref table originally had only one index, a composite of partnumber and option. When a query was performed that joined …
Re: Indexing strategy
1rk2ciINNrhr@emory.mathcs.emory.edu writes: >: Stuff deleted.. >: If you define the unique 3-part index before the >: non-unique 2-part index, the query optimizer may already be using the 3-part >: index (so I have heard), since the optimizer finds the 3-part index first, >: an…
Re: re:choosing idx to use
Ann Barnes@letterkenn-emh1.army.mil writes: |> |> When you create a composite index, the first field is also, effectively an |> index of its own. This was mentioned in the query optimization article here |> yesterday, but perhaps not specifically stated. Actually we have found i…
Re: Query Optimism
%UNIPLEX %TO informix-list@rmy.emory.edu %FROM rridley %SYSTEM DHLNET %SUBJECT Re: Query Optimism %VERIFY y %DATE 29/03/93 16:30 %REFERENCE 17053 Organization: Informix Software, Inc. Re: >In article <billd.733006990@cheetah…
Re: Help: SQL query optimizer
In article <billd.733006990@cheetah>, billd@informix.com (William Daul) writes: |> |> From: Spring 1987 TechNotes |> |> Query Optimization |> ================== |> Uh, Bill? This article is on the Rule-Based optimizer, which we have not used since 1989 (the 4.0 release of p…
Re: Help: SQL query optimizer
Anique Van der Vlugt (anique@sun-4.cs.uct.ac.za) wrote: : : Hi : : I am presently involved in a project for a SQL query optimizer for INFORMIX. : Has anyone done any research in this field or knows of anyone who does? I : am also interested in any articles related to the field o…
Re: Help: SQL query optimizer
In <anique.732967452@sun-4> anique@sun-4.cs.uct.ac.za (Anique Van der Vlugt) writes: >I am presently involved in a project for a SQL query optimizer for INFORMIX. >Has anyone done any research in this field or knows of anyone who does? I >am also interested in any articles rela…
Help: SQL query optimizer
Hi I am presently involved in a project for a SQL query optimizer for INFORMIX. Has anyone done any research in this field or knows of anyone who does? I am also interested in any articles related to the field of query optimization. If you can help me in any way please email m…
Re: Two index query optimization problem
Devin Wala writes: > > >I'm having some problems with Informix over optimizing my query. >I have a table with > 500000 rows and I can't get Informix to >use what I deem to be the "correct" index. > >There are two indexes on the table: > > index1: unique index on A, B; > index…
Re: Two index query optimization problem
> I'm having some problems with Informix over optimizing my query. > I have a table with > 500000 rows and I can't get Informix to > use what I deem to be the "correct" index. > > There are two indexes on the table: > > index1: unique index on A, B; > index2: unique index o…
Two index query optimization problem (fwd)
} I'm having some problems with Informix over optimizing my query. } I have a table with > 500000 rows and I can't get Informix to } use what I deem to be the "correct" index. } } There are two indexes on the table: } } index1: unique index on A, B; } index2: unique index o…
Re: Two index query optimization problem
In article <1992Dec12.000653.7004@anasaz> devin@anasaz (Devin Wala) writes: > > >There are two indexes on the table: > > index1: unique index on A, B; > index2: unique index on C, D, A, B; > >The problem I'm having is that I can't run a query with A and B mentioned >in the WH…
Two index query optimization problem
I'm having some problems with Informix over optimizing my query. I have a table with > 500000 rows and I can't get Informix to use what I deem to be the "correct" index. There are two indexes on the table: index1: unique index on A, B; index2: unique index on C, D, A, B; …
Re: QUERY Optimizer
> Hi netters > > I have observed that the optimizer (SQL 4.0 and an On-Line 4.0 DB) is > very often guessing wrong, even if we run update statistics. > > The estimated number of rows returned does very much depend on the > sequence in which you enter the SELECT statement. In one …
QUERY Optimizer
Christian Hansen write: >I have observed that the optimizer (SQL 4.0 and an On-Line 4.0 DB) is >very often guessing wrong, even if we run update statistics. > >The estimated number of rows returned does very much depend on the >sequence in which you enter the SELECT statement. …
QUERY Optimizer
Hi netters I have observed that the optimizer (SQL 4.0 and an On-Line 4.0 DB) is very often guessing wrong, even if we run update statistics. The estimated number of rows returned does very much depend on the sequence in which you enter the SELECT statement. In one case we had …
query optimization
jmn@pdx.csd.mot.com (Jim Nielsen) write : >Can anyone tell me where I might find some definitive information on >how to optimize wildcard searches. > >I have a table which contains 300,000 records and I need to look up >records based on 6 possible fields. Some of the fields can…
Query Optimizer
What follows are some excerts from my previous posting and an update: > > In running the query described below on my OLD version 2.10.03K performance > was completely acceptable. On version 4.0, ouch!!!! Queries that took seconds > were now taking lots........ of minutes like 15…
Re: Update Statistics
> > Does anyone have a recommendation on how often the update statistics > command should be run? 'update statistics' only updates the system catalogs with the correct number of rows and the 'next-to-highest' and 'next-to-lowest' values so that the optimizer can make an educated…
(no subject)
rhlab!kuhn@uunet.uu.net writes: > In running the query described below on my OLD version performance was > completely acceptable. On version 4.0, ouch!!!! Queries that took seconds > were now taking lots........ of minutes like 15,20,25 minutes. > > After sending tech support a s…