Oninit® Archive
Results for “LRUS”
Large memory segment vs smaller ones
Mike, BUFFERPOOL default,buffers=3500000,lrus=500,lru_min_dirty=0.20,lru_max_dirty=0.50 BUFFERPOOL size=4K,buffers=45000000,lrus=500,lru_min_dirty=0.06,lru_max_dirty=0.14 BUFFERPOOL size=16K,buffers=625000,lrus=500,lru_min_dirty=2.00,lru_max_dirty=5.00 All dbspaces…
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 ------------------------------…
Buffer wait occurs when performing INSERT in multiple sessions
You have to only peripherally related problems. The issue about not enough KAIO resources is an operating system tuning parameter. You can read the maximum value and set it here: $ cat /proc/sys/fs/aio-max-nr 65536 echo 131072 >/proc/sys/fs/aio-max-nr # set new maximum And see …
Index page size recommendations
16 k for indices is a good starting point. After that is depends on the data. If I am using TS then I would tend to have dedicate spaces as well. And yes you need a buffer pool for each page size. Paul Watson Oninit LLC +1-913-387-7529 www.oninit.com Oninit® is a registered trade…
Block during checkpoint
Hi Mr Art I'm refer back to my old 2020. I wanted to share my onstat result. We are running Financial application OLTP whereby apps and db in seperate VM. With 64GB of RAM and 32 CPU been allocated to the VM , necessary config has been tune. Unfortunaly recently we hit system han…
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…
Problem with backup
Original post: Hello, every time we release a copy with onbar , the Database server gets blocked one to three minutes. Is this normal ? Our version is 12.10.FC3WE and the command is onbar -b -w Thank Response: The answer is possibly. At the start of every backup, the server…
Physical Log size
IDS 12.10.FC9W1 AIX 7 I am trying to calculate if our Physical Log size is big enough. My reason: Checkpoint Completed: duration was 171 seconds. Sometimes we get hit by large checkpoints. From the manual: ---------------- To ensure that you have an abundance of space, set the …
25582 error on high volume of short live trans
Hi IIUG, Trying to find why my DB blows up to high CPU. it has 62 physical cores (x4 smt) on AIX machine P8 running 11.70 IDS. We are getting -25582 error after putting significant load of transactions. The volume of transactions is big but short live. Here's the config below:…
Bufferpool configuration
Hi informix community, on a SPARC M10-1 Server we have a informix 12.10FC10 instance. Currently this instace use a buffer pool with around 7GB. Now i have the chance to configure the buffers up to 40GB. I would like to use the following configuration of the buffer pool: BUFFER…
BUFFERPOOL Configuration
Hi, I saw an excellent video post from AdvancedDataTools https://www.youtube.com/watch?v=Wgw1bAWl_Hg regarding sample BUFFERPOOL configurations 1.3 GB Memory for Buffer - Linux OLTP System - BUFFERPOOL size=2k,buffers=1500000,lrus=32,lru_min_dirty=10,lru_max_dirty=20 2. 12 GB …
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…
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.…
Informix 12.1 Blocking Checkpoints
> On 7 Nov 2017, at 10:48, NATYURAL HORACIO <horacio.natyural@gmail.com> wrote: > > Hi, > > > Based on the current workload, the physical log might be too small > to accommodate the time it takes to flush the buffer pool during > checkpoint processing. The server might block tran…
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…
identify what is allocating memory
original post: Hi , How identify what/who is consuming memory in a specific virtual memory segment ? With onstat -g ses , there is no session with high memory allocated. The amount of users sessions is keeping at regular average... No buffers pool was allocated automatically (I…
Question on PHYSFILE size and buffers ...
My current buffers are totaled for 53000 while according to the guideline found inside the onconfig file, my PHYSFILE is sized good for roughly up to 272000 total buffers? (299000/1.1), am I reading this correctly?Thanks in advance for any inputs.Kern -- #########################…
Buffer pools in 11.50.FC5
IDS 11.50.FC5 Solaris 10 Sparc I need some guidance on BUFFERPOOL. I am receiving the 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 threads. I am not sure how that translat…
Odd Bufferpool Behaviou
Original post: AIX 6.1 IDS 11.70.FC8X8 I have a new machine with a lot of extra memory. Given that, I added a bunch of new buffers (4k, 8k, & 16k) and went to town testing away. Long story short, with all those new buffers, I get virtual segments added at startup. In onstat -g …
LRUS_MIN MAX DOES NOT WORK
lru_min_dirty should be less than lru_max_dirty If you have 400,000 buffers and 20 LRU queues then each queue should have 20,000 buffers. If you meant to have lru_min_dirty = 10.0 and lru_max_dirty = 20.0 then LRU flushing would begin on a LRU queue when 4000 buffers are dirty a…
Long checkpoint problem
Hi, we have from time to time long checkpoints in informix 11.70 C5, we have lowered the Min_drity and max_dirty to 2 and 1% but the same problem. we have 400000 bufferpool and Lrus=20 and cleaners=8, what should I do plz, we suspect a IO disk problem, we have one disk including…
Database hanging
Hi, we have an 11.70 C5 Informix database of 90 GB and since 3 weeks we have encoutered some probelems, too simply the database is hanging , when we launch from the server dbaccess mydbname its hanging and the database want to let us access and same thing for the clients. the se…
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)…
RSS not working
-bash-4.2$ onstat - IBM Informix Dynamic Server Version 11.50.FC9 -- On-Line --…
Physical Log Size
IDS 11.70.FC8 AIX 1 6 00CC96664C00 I received the following message in the online.log file ..... is it something to be concerned about ? Based on the current workload, the physical log might be too small to accommodate the time it takes to flush the buffer pool during checkpoi…
new bufferpool
original post This concerns ids12.10TC3IE . These are the old lines in my onconfig... #BUFFERPOOL default,buffers=10000,lrus=8,lru_min_dirty=50.00,lru_max_dirty=60.50 #BUFFERPOOL size=4K,buffers=100000,lrus=8,lru_min_dirty=20.00,lru_max_dirty=30.00 #BUFFERPOOL size=16K,buffers=…
Informix upgrade
Can we upgrade informix from Dynamic Server Version 11.70 to 12.1 workgroup edition directly?…
Buffer Size and Use
Folks, We recently had a conversation with a well-respected name in the Informix world, recently, concerning our bufferpool configuration. When exported, our database takes up only about 18 GB. We had a buffer pool of 12 GB, figuring that the more memory resident, the better. Al…
class B segments
I have a question on the below âonstat âg segâ output. What does the class B represent? I never saw the B class until I went to TC2. IBM Informix Dynamic Server Version 12.10.TC2IE -- On-Line -- Up 01:46:25 -- 740672 Kbytes Segment Summary: id key addr size ovhd class blk…
Checkpoint causes Db to "freeze"
Hi Keith, this happened about 2 months ago and until now, my users are experiencing the same issue even i've already twicked the LRUs,CKPINTVL. Would you know how should i check the battery from the disk array? I'm unable to find any issue from the online.log.…
Performance Impact after storage migration
Hello All, IDS 11.50.FC8W2 on HP-UX B.11.31 U ia64 Recently we have upgraded our storage and the hp boxes and since then we see intermittent performance issues. onstat -g ckp AUTO_CKPTS=On RTO_SERVER_RESTART=180 seconds Estimated recovery time 1304 seconds We observed that th…
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.…
onstat -g ckp Question
When we are transferring an index from the primary to the secondary we = have a problem. All the work and maintain a clean buffer pool on the primary= is done all the index is being built. However on the secondary there is no= way to keep the buffer pool clean. If we do not keep …
DB_locale or local naming convention
Hi, I already mention the informix version. IBM Informix Dynamic Server Version 11.70.TC1IE…
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,…
Bufferpool max size in Windows Server 2008 64bit
Hi, I am installing Informix 11.70 for a DW. On my Windows Server 2008 (64bit) I have 64GB memory and I am trying to take advantage of it. I have set the following bufferpool sizes and restarted the engine, but my parameters are not respected and the actual values are much lowe…
Is bouncing Informix necessary after changing BUFF
For example, from: BUFFERPOOL size=2K,buffers=5000,lrus=8,lru_min_dirty=50,lru_max_dirty=60 to: BUFFERPOOL size=2K,buffers=10000,lrus=8,lru_min_dirty=50,lru_max_dirty=60 Do we need to bounce Informix to bring the new modification into effect? Thank you in advance. Kern --…
buffer pool and dbimport (11.70FC5)
Hi, I'm facing a problem and i don't understand how is it possible ... I'm loading (dbimport) a big table (> 3 Million records) and my buffer pool becomes quickly full (700000 buffers with LRU min = 0.50 and max 1.00). Checkpoint is not trigger until CKPINTVL (180) and you can im…
shared memory
This concerns IDS 11.70.TC5IE on Windows Server 2008 . This article http://publib.boulder.ibm.com/infocenter/idshelp/v117/index.jsp?topic=%2Fcom.ibm .perf.doc%2Fids_prf_750.htm defines buffer_value = (BUFFERS * pagesize) + (BUFFERS * 254) + 250000and goes on to say: âIf you hav…
Disabling LRU flush
Hi, IFX 11.70 FC 5 Innovator-C , Linux 64bits OpenSuse. I'm working with database load. Basically I'm using HPL, unfortunately some tables have huge rowsize0 (1 row size = 2 pages) and lvarchar datatype which force use deluxe mode. Consequently use buffer pool , and then LRU fl…
BTR on each buffer pool?
This concerns IBM Informix Dynamic Server Version 11.70.TC5IE . I have a 16k page size space where I put a temp space and all primary and foreign key indexes. Since I can select nbuffs, bufwaits, bufwrites, pagreads from sysmaster:sysbufpool I can get the BTR on each pool. Should…
LRU Queues - more or less
These are two theoretical questions (based on a current situation) 1) Is it better to use fewer larger LRU queues or many small queues if there are a small number of dirty buffers? 2) Is it better to use fewer cleaners and keep them active or is there a way to balance cleaner l…
Correct method of sizing resident pool...
Hi all, I have a script that reads an onconfig file and outputs an estimated memory footprint of the instance. However, I am finding it hard to accurately predict the resident section size. According to http://publib.boulder.ibm.com/infocenter/idshelp/v111/index.jsp?topic=/com…
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…
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 …
ZFS and Informix
I'm well aware that the buffer pool has nothing to do with the underlying file system. We're just trying to figure out what scales better. We know that ZFS's ARC scales very well (the algorithms come from IBM !!). I trust though the people that have been out in the trenches worki…
Informix Status Explanations
hi, can anyone shed light on this for me. what does this mean? status yield bufwait- does it mean i'm lacking buffer pools? what does this indicate? cond wait netnorm - session is not doing anything. running- does it mean the sql is currently running. yield lockwaits - does th…
Increase buffer pool size
Dear All, i found the following line in the message log of an IDS 10.00 on a Linux Box having 3GB memory: WARNING: Buffer pool size is too small for read ahead operation I would like to increase this parameter, as obviously it has the default size of 5000 buffers with a 2k page…
Informix question
Original Post: Hi, I have two confused question. 1 When a update SQL will update totally 3 pages in bufferpool? How many mutex IDS will allocate for this thread in the buffer-head entry in the buffer table? 2. What the temporary sbspace will be used for? thanks for your time.…
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…
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…
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…
PROBLEM WITH HPL ON INFORMIX 11.5.FC5 - SOLARIS
Dears, I am trying to import data using HPL on INFORMIX 11.50.FC5 in Solaris (SunOS 000sv432 5.10 Generic_142900-01 sun4v sparc SUNW,SPARC-Enterprise-T5120 Solaris). When I starts the onpload, this message appears: 15:54:53 Requested shared memory segment size rounded from 923…
RE: Long Checkpoints with HDR and 11.5.
Art Kagel wrote: No, Jacques, IDS secondaries do not share buffer pool updates with the primary. Only the logical log buffers are transferred, so only the server's transaction rate would affect the data transfer rate between the servers and that would be about the same regardles…
Re: performance improvements for dbimport?
Thanks for all your valuable input. I changed some parameters now: 21:09:27 Onconfig parameter BUFFERPOOL modified from size=2K,buffers=262144,lrus=8,lru_min_dirty=5.0,lru_max_dirty=10.0 to size=2K,buffers=524288,lrus=8,lru_min_dirty=10.0,lru_max_dirty=50.0. 21:09:27 Onconfig p…
Network Buffer Pools
IDS 11.50.FC5 AIX 5.3 For HDR replication between two AIX 5.3 servers, is there a suggested value for the following environment parameters: 1. IFX_NETBUF_PVTPOOL_SIZE 2. IFX_NETBUF_SIZE 3. Sqlhosts option b (client buffer size) The primary has 64GB of memory while the second…
Resident Memory larger then expected
Hi all, in onconfig I set BUFFERPOOL size=2K,buffers=20000,lrus=8,lru_min_dirty=20.000000,lru_max_dirty=30.000000 . In the message log I see: Memory sizes:resident:570368 KB In earlier versions of IDS the formular was BUFFERS x 2 = Size in KB. I had expected memory size resid…
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…
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…
physical log might be too small
Hello, We are getting following error while checking checkpoints "Based on the current workload, the physical log might be too small to accommodate the time it takes to flush the buffer pool during checkpoint processing. The server might block transactions during checkpoints. I…
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 …
Checkpoint Duration
Check the tail of onstat -R Is your total count of dirty buffers staying below 6400? If it significantly exceeds the designated 2% max of 320000 buffers, then your LRUs aren't flushing fast enough and the checkpoints have more work. If you see this, bump your LRUs to 512. Raisin…
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…
IDS 7.31 Solaris8 - Long Checkpoints
Hello, I changed LRUS and CLEANERS to 128, LRU_MAX_DIRTY to 2 and LRU_MIN_DIRTY to 1 on a Solaris8 testserver with 2 processors and 2GB RAM. The chackpoints are shorter but the IDS server is much slower then before: a load of about 85000 records takes 25 minutes now, 7 minutes be…
BUFFERPOOL question
Hi all, I have a basic question but it make me confuse. What's the different between BUFFERPOOL below ? BUFFERPOOL size=2K,buffers=1000000,lrus=64,lru_min_dirty=1,lru_max_dirty=2 and BUFFERPOOL size=2K,buffers=1000000,lrus=64,lru_min_dirty=51,lru_max_dirty=52 Best Regards, Jak…
Buffer Pool
Hi, We are running informix 9.4 FC5xs with SAP. Our SAP admin recently advised that the INFORMIX buffers were set to low. Based on some SAP recommendation, we increased the buffers parameter from 301049 to 501049 (about 600Mb to a little les than 1Gb. 2 days later I found the fo…
Fatal error
Dear Friends, When i am try to onlining the informix i got this messages informix@DBSERVER> oninit -v -y Checking group membership to determine server run modesucceeded Reading configuration file '/export/home/informix/IDS0/etc/onconfig.voms'...succeeded Creating /INFORMIXTMP/.…
Re: Best Use of Free Memory
David, I see the confusion now. The English phrase, "Needs to acquire a buffer," is too vague. There are really two major cases, but the manual is only addressing one (the rarer one). The cases are: 1. The required data is already in the buffer pool. In this case the thread nee…
Re: Best Use of Free Memory
On Tue, Oct 28, 2008 at 7:14 PM, david@smooth1.co.uk <david@smooth1.co.uk>wrote: <SNIP> > > > > As the number of buffers go up the lru chains get longer and so the > time to find a buffer can increase (if the buffer is further down an > LRU queue > at the time). > David, If the…
Best Use of Free Memory
BUFFERS is generally a good place place to use extra memory, subject to a couple caveats: 1. If the working set already fits in the current buffer pool, adding still more buffers will not produce any noticeable performance increase. Check "onstat -g buf" output for your %cached.…
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…
CPU VPs
To scale for anticipated traffic we increased number of CPU Vps from 15 to 25. Along with that we changed the affinity also. We were expecting increase in performance but it actually degraded the performance. Since then we have tried adjusting PC_HASHSIZE/POOL, DS_HASHSIZE/POOL, …
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…
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…
onstat -g rea almot 100 queue there !!!
Sorry ... to post again ~~~ According to http://www.informixfaq.com/faq.php?id=6 , "LRUs and BUFFERs" , the recommended LRUS is set 128 , I just set this 8 ... that is a huge gap !! I've 4G RAM in the server , so if I modify LRU , 8 -> 128 , I also need to change Buffers , say …
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.…
LRUS and CLEANERS ids 9.40
Hi all, I read a section from IBM performance and tuning curse there's a rule of thumb for LRUS. It says that I have to calculate LRUS aproximately 2000 for each pair, so if I have 1000000 BUFFERS. Do I have to set LRUS to 500? or Do I have to consider other things? and what …
Create Index Mysteriously Slow at the End - IDS 11.10.UC2W2 - Red Hat EL5
Andrew Ford wrote: > From: <jprenaut@yahoo.com> > >>If you are always catching the flush_sub threads with this stack, then >>they have submitted an I/O request to the KAIO threads > > > I thought it would be interesting if I disabled KAIO and went with AIOVPs. > > Totally differe…
LRUS / page cleaner recommendations on 10.0?
What is the accepted wisdom for determining LRUS and CLEANERS on 10.0 running on RAID 1+0 ? I seem to be getting conflicting opinions from different sources. Andy…
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…
Buffer waits
Onstat -R shows clean versus dirty buffers, not used versus unused. Onstat -P on the first line which is partnum zero (0) the 'other' column is the number of unused buffers, usually zero for any server that's been online for a reasonable time. Bufwaits have two sources, one is s…
Re: 9.40FC9 BUFFERS limit
On Jul 25, 4:41 pm, <eshkambx-i...@yahoo.com> wrote: > Hi > > Does anyone know what is real maximum number (not from release notes) of BUFFERS parameter for IDS > 9.40FC9 for Solaris 10? Exact Solaris version is: Solaris 10 11/06 s10s_u3wos_10 SPARC. > > Situation: > > We have ne…
description of onstat -g ntt
Hi Karl, From IBM Performance Guide v9.4, we can find this explanation on the q-exceed field: << output output field Description -------------------------------------------------------------------------------- -------------- onstat -g ntm q-exceeds Number of times the free buff…
Re: Strange behaviour of the buffer pool
On Jul 17, 8:57 am, RoB <pluma...@gmail.com> wrote: > >My post to the news group is taking forever. In any case, I looked > >around a bit and it seems like the easiest way to get your resident > >section to become larger, other then BUFFERS in the $ONCONFIG, is the > >LOCKS para…
Re: Strange behaviour of the buffer pool
On 17 Jul, 12:10, RoB <pluma...@gmail.com> wrote: > Hi all, > > IDS: 9.40.FC3W2 > OS: HP-UX 11.11 > > What am I missing here? An instance is unexplainably allocating 224 MB > of buffer pool in addition to the amount configured. > > The BUFFERS onconfig parameter is set to 6250 (=…
Re: Strange behaviour of the buffer pool
Looking at a larger instance on the same versions I can see the "resident" pool being 354MB while the "res-buff" being the same the BUFFERS setting: onstat -g mem|grep " R " res-buff R c00000001669d040 1280004096 2848 2 2 resident R c000000000491040 …
Strange behaviour of the buffer pool
Hi all, IDS: 9.40.FC3W2 OS: HP-UX 11.11 What am I missing here? An instance is unexplainably allocating 224 MB of buffer pool in addition to the amount configured. The BUFFERS onconfig parameter is set to 6250 (= 12.2MB): onstat -c|egrep "BUFF|SHM" BUFFERS …
IIUG TV
Great job on the video work!! I look forward to seeing more! -t- -- -- Informix Dynamic Server Database Engine -- http://www.informix.com --…
Re: Slow database creation and loading
On Jun 18, 10:50 pm, "Jack Parker" <jack.park...@verizon.net> wrote: > If you are using HPL, that grabs it's own memory. Data does not go through > the normal buffer pool (unless you are using deluxe mode). You might not > want to increase buffers. I need to double check but I…
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…
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…
Increase in checkpoint time
On 28/02/07, S SURESH <suresh.sambana@ril.com> wrote: > What is CCLAGS? where/How can we set this ? > Can you give me the procedure? > > these are my onconfig settings > > BUFFERS 400000 > CLEANERS 40 > LRUS 24 > LRU_MAX_DIRTY 2 > LRU_MIN_DIRTY 1 > > > ***************************…
error initializing
Hi: when initializing my INFORMIX leaves the following message to me error: $ oninit -v Checking group membership to determine server run mode...succeeded Reading configuration file '/usr/informix/etc/onconfig.nazca'...succeeded Creating /INFORMIXTMP/.infxdirs...succeeded Creat…
Total length of columns in constraint is too long
Hi, We recently migrated our application from MySQL to IDS. While the migration (post DDL and few other code changes) worked just fine in a dev. environment on windows, while executing DDL scripts on Linux, IDS throws this error. Basically I have a unique constraint on 3 columns…
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…
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…
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…
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?…
How do it get writes form the lrus in V10
I have a new HP Intel 32 bit chip machine with 2 dual core processors and 8 Gb of memory. This machine runs one production database (Mostly OLTP) and a test database that is same thing but very low transactions When I run on stat -F I have 0 FG writes and 0 LRU writes and Chuun…
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/…
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!…
Check INFORMIXDIR and DBLANG.FAILED
Hill, what could have caused it ? angel:/opt/informixids/msg/en_us/0333}oninit -v Checking group membership to determine server run modesucceeded Reading configuration file '/opt/informixids/etc/onconfig.angel'...succeeded Creating /INFORMIXTMP/.infxdirs ... succeeded Creating …
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.…
oninit: Dictionary Cache and SPL Routine Cache error
I am having some trouble initializing shared memory on Solaris 9 with Informix IDS 9.4. --------------- $ oninit -ivy Checking group membership to determine server run modesucceeded Reading configuration file '/dbms/informix/etc/onconfig.site'...succeeded Creating /INFORMIXTMP/…
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: Re: oninit error .. [5496]
$ oninit -ivy Checking group membership to determine server run modesucceeded Reading configuration file '/opt/informix/etc/onconfig.padbv2'...succeeded Creating /INFORMIXTMP/.infxdirs ... succeeded Creating infos file "/opt/informix/etc/.infos.padbv2" ... "/opt/informix/etc/.co …
Installation problem
I am attempting to upgrade an Informix installation from 7.3x on Sun 5.7 to 9.4 on Sun 5.9. When I run oninit -ivy I get the following: Creating buffer pool 200002 kbytes...succeeded Initializing rhead structure...succeeded init_alarm failed fyi: I installed a new version of IS…
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…
error the running INSTANCIA
Hi: Cuando inicio la instancia me sale el siguiente mensaje de error.... alguna idea, se los agradecere. Me pueden dar una pista ??? saludos ============================================================= Checking group membership to determine server run modesucceeded Reading co…
error the running INSTANCIA
Hi: Cuando inicio la instancia me sale el siguiente mensaje de error.... alguna idea, se los agradecere. Me pueden dar una pista ??? saludos ============================================================= Checking group membership to determine server run modesucceeded Readin…
How to determine optimum buffer size?
Hello, how do I (or how do you) determine the optimum buffer size (on IDS 9.40, but I think it's a generic question) ? I have a machine with almost 'unlimited' memory (96 GB RAM). Therefore I could define a large number of buffer pages. But I'm not sure if at some point the adm…
What counts sysbufhdr.reusecnt ?
Hi, I found the table sysbufhdr in the sysmaster database apparently containing information about the database buffer pages. One column has the name 'reusecnt' - does anybody know what exactly that column counts? Most entries have reusecnt=0 and I have one system (with a very la…
Re: RESIDENT and BUFFERPOOL
David E. Grove wrote: >>On Solaris the 4MB page size is used for any segment made resident, no >>matter how many there are. > > Since page size is now settable in IDS 10, does the above have any > implication on specifying a BUFFERPOOL page size? I'm no sure whether you understa…
Re: RESIDENT and BUFFERPOOL
David E. Grove wrote: >>On Solaris the 4MB page size is used for any segment made resident, no >>matter how many there are. > > Since page size is now settable in IDS 10, does the above have any > implication on specifying a BUFFERPOOL page size? I'm no sure whether you understa…
Re: Expert advice needed on Buffer management
jpierrot@chubb.com wrote: > Hi gang, His per-session buffer pool requirement calculation is completely bogus since most sessions will be sharing the use of the same pages of data and which pages are shared and which are uniquely used by a single session will differ from server t…
Expert advice needed on Buffer management
Hi gang, I received this below from the architecture Dept. trying to simulate Production like performance in QC and development envs. Assuming performance testing would be equal in all those environments if buffers are adjusted to a certain value. Please advise! My question to yo…
Expert advice needed on Buffer management
Hi gang, I received this below from the architecture Dept. trying to simulate Production like performance in QC and development envs. Assuming performance testing would be equal in all those environments if buffers are adjusted to a certain value. Please advise! My question to yo…
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…
RE: IDS 10 Download?
Isn't informix's general default for size, 8K? So would not the bufferpool default line you showed mean there is an 8k entry? NJ -----Original Message----- From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On Behalf Of David Williams Sent: Monday, Februar…
RE: IDS 10 Download?
Isn't informix's general default for size, 8K? So would not the bufferpool default line you showed mean there is an 8k entry? NJ -----Original Message----- From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On Behalf Of David Williams Sent: Monday, Februar…
IDS 10 Download?
So many questions... I have played with multiple buffer pools and different page sizes... creating a dbspace with an 8k page size..oh wow! Make size is only 16K though...oracle (where I guess this idea came from) allows 64K! onstat -h (buffer hash chain info) gives two outputs …
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…
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'?…
SAME-- config effects
So, how does the SAME idea affect config parms, like LRUS, that used to depend on # of spindles and/or chunks? For instance we will have a single 72GB rootdbs, comprised of a single chunk. How do I count these things, now? 'format' sees a single disk, but I'm pretty sure I'l…
IDS V7.30 and Windows 2000
Can Informix Dynamic Server Version 7.30.TC6 be run on a Windows 2000 host system? TIA Erwin…
problems of Inztallation's
Hi: I have problems with thle installation of IDS. Plataform: HP-UX 11.11 IDS: 7.31 FD8 I cannot initialize !!! If I want to iniciarlize via onmonitor .... the error is: shared memory not initialized for INFORMIXSERVER 'crazy_tcp If i want to inicialize vi command ..... the err…
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…
Intitialization problem
Hi, I have a problem with IDS 7.31 on SCO 5.0.5 When trying to initialize IDS and it hangs. Here is the oninit -v command: # oninit -v Checking group membership to determine server run modesucceeded Reading configuration file '/usr/informix/etc/onconfig'...succeeded Creating …
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…
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…
Informix IDS problem
Hi All, When I try to start the IDS 9.40 on HP PA-RISC machine, I get the following error. If I reinstall the IDS it works properly. If I shut down & restart the database it fails with the below message.. Checking group membership to determine server run modesucceeded Reading …
RE: Clearing Buffer Pool
Informix (unlike MS SQL) keeps all pages in the buffer pool 'forever' - until page becames replaced by another page... ------------------------------------------ Alexey Sonkin > From: Dave Griffen [mailto:dgriffen@nospam.finishline.com] > > I do mean to remove all non essential…
RE: Clearing Buffer Pool
To clear the buffer pool from dirty pages, generate a chackpoint with 'onmode -c' If You mean to remove all pages from it, then it's impossible. ------------------------------------------ Alexey Sonkin > -----Original Message----- > > Does anyone know if there is a way to clea…
Clearing Buffer Pool
Does anyone know if there is a way to clear the buffer pool without bouncing the engine?…
Re: BUFFERS! Arghhh!!! Please help before I do something silly!
I don't know what rule or recommendation are you following but if I increase buffers I would increase LRUS to spread buffers along LRUS. If you keep the same value for buffers and increase LRUS you 'll decrease the number of buffer per LRU. esteban.- "David Williams" <djw@smoot…
Re: BUFFERS! Arghhh!!! Please help before I do something silly!
> CLEANERS and LRUS seem to be sufficient without more info. How many chunks > do you have? Set CLEANERS to at least 1.5*#chunks plus a few, if the 84 is > more than that then leave it. Looks like you're running 9.4, try reducing > LRU_MAX/MIN_DIRTY to 1.0 and 0.5 or 1.0 & 0 …
Re: BUFFERS! Arghhh!!! Please help before I do something silly!
Thanks for the info all...I made the change and no fires this morning. I did however notice that my checkpoints increased from around 4 seconds to 10 seconds. I know Art specifically mentioned that this might happen, amongst other folks, so I was wondering what I should tweak fir…
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.…
Long checkpoints on AIX/IDS7.31/IBM Shark
List, We have very sporadic, very long checkpoints on our IBM RS/6000 boxes (AIX 4.3.3, IDS 7.31.UD4) connected to an IBM Shark (2105-F20), eg. 66 seconds to write away 2772 KB. Normally checkpoints are 0 - 1 seconds for 10 - 20 MB: $ onstat -c | grep -e BUFFERS -e LRU -e CKPTI…
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…
Performance is getting worst after turn on the LRUAGE
On Sun, 28 Mar 2004 22:40:01 -0500, miyaki wrote: Other is usually 'unused pages'. Look at the top of the onstat -P report. On the line for address zero (0), is the value under Other very large? Those are unused buffer pages, ie no data pages have been loaded into them. There…
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: Buffers and LRU.
Madison, the standard interpretation of LRU is Least Recently Used. The standard usage of such a queue is as follows: Each queue has an MRU (Most Recently Used) end and an LRU end. When a buffer is touched (either read or written) it is moved to the MRU end of the queue. When a…
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…
Re: Buffers and LRU.
"T.K" <gp@tf.de> wrote in message news:<bvrslu$67h$1@inews.gazeta.pl>... > Hello. > I'm beginner in use Informix. > Where can I find what are the main difference between > buffers and LRU queue. > > Thanks for your help > > T.K Its kind of like asking what is t…
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…
Buffers and LRU.
The buffer pool is the page cache of the engine. The LRUs are simply a means of chaining the buffers together. There are two chains per LRU - the free and the dirty. (Actually a free buffer has a page in it, but it is not dirty.) There are multiple LRUs so that if a thread tri…
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…
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.…
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…
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?…
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: IDS 9.40 Documentation (LRUs).
Thats only because she feels sorry for you. She knows you're probably not getting any at home, besides, thats her standard rate for men with small cocks. Neil Truby" <neil.truby@ardenta.com> wrote in message news:<bjq2m7$lbgm5$1@ID-162943.news.uni-berlin.de>... > "David Brent" <…
Fw: IDS 9.40 Documentation (LRUs).
> Your wife offered �10. Frequently I'm told. > Whatever happened to her bulk discount? sending to informix-list…
Re: IDS 9.40 Documentation (LRUs).
"David Brent" <brentmeistercomedian@hotmail.com> wrote in message news:43d09671.0309110133.282a63bf@posting.google.com... > "Neil Truby" <neil.truby@ardenta.com> wrote in message news:<bjos24$l3pl4$1@ID-162943.news.uni-berlin.de>... > > "rdtbra" <reitota@hotmail.com> wrote in mes…
Re: IDS 9.40 Documentation (LRUs).
Andrew Thank you. Helped a lot. RDT. andrew.watson@ardenta.com (Andy Watson) wrote in message news:<5708c605.0309090050.66dcb609@posting.google.com>... > The old algorithm gave pages priority based on assumptions about > importance giving data pages low, index leaf pages mediu…
Re: IDS 9.40 Documentation (LRUs).
The old algorithm gave pages priority based on assumptions about importance giving data pages low, index leaf pages medium-low, index branch pages medium-high and root nodes high (in later versions). The problem with this is that in practice many indexes were typically created o…
IDS 9.40 Documentation (LRUs).
Hello. I�ve been trying to find some information about changes in the way IDS 9.40 handles LRU Queues. It seems that there is a new algorithm that allows a performance enhancement regarding Low and High Priority Buffers. The 9.40 documentation does not mention anything, but i…
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…
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: no checkpoint
rkusenet wrote: > "Franklin Tang" <franklin@macauslot.com> wrote in message news:badmbv$eqo1@ctmsun0.macau.ctm.net... > >>Dear All, >> I just want to know if I set the CKPTINTVL to 36000 which an hour, of > > > 36000 is ten hours, not 1 hr. > > >>LRUS 512 …
Re: LRU writes
To increase the number of LRU Writes, I think you should increase LRUS (I usually use LRUS=BUFFERS/1000), and/or increase CKPTINTVL giving LRUS more chance to reach LRU_MAX_DIRTY. Regards AR "Franklin Tang" <franklin@macauslot.com> a �crit dans le message de news:b95ki7$8jr2@ct…
RE: LRU writes
> -----Original Message----- > From: Stefan Weideneder [SMTP:stefan@weideneder.de] > Sent: Monday, May 05, 2003 1:16 PM > To: informix-list@iiug.org > Subject: RE: LRU writes > > > > Assuming you really do want to cause more LRU writes because of > > excessive checkpoint duration…
RE: LRU writes
> -----Original Message----- > From: Stefan Weideneder [SMTP:stefan@weideneder.de] > Sent: Monday, May 05, 2003 1:16 PM > To: informix-list@iiug.org > Subject: RE: LRU writes > > > > Assuming you really do want to cause more LRU writes because of > > excessive checkpoint duration…
RE: LRU writes
> Assuming you really do want to cause more LRU writes because of > excessive checkpoint duration, simply reducing the number of LRUs won't > work. That would increase the number of buffers per LRU. It will then > take > longer to reach the value for LRU_MAX_DIRTY. You would g…
regarding concept of physical logging??
hello, i have a serious confusion regarding tha concept of physical logging, this might sound silly for an expert kindly bear with me and explain.. according to what the book says.. physical logbuffer contains the before images of the data that taken from disk for modification..…
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…
FW: FW: LRU's and CLEANERS (IDS 9.21FC1)
-----Original Message----- From: owner-informix-list@iiug.iiug.org [mailto:owner-informix-list@iiug.iiug.org]On Behalf Of David Williams Sent: Saturday, February 03, 2001 4:39 PM To: informix-list@iiug.org Subject: Re: FW: LRU's and CLEANERS (IDS 9.21FC1) In article <95efd3$2ha$…
FW: LRU's and CLEANERS (IDS 9.21FC1)
Thanks for the input Christian. I just still have to be convinced about this one. I think your suggestion is also in line with what the manual says, however I've heard of a lot of people having 128 LRUS on only a couple of cpus. In a previous post by Art Kagel (Wed 11/29/2…
LRU's and CLEANERS (IDS 9.21FC1)
"Dirk Moolman" <dirkm@reach.co.za> wrote in message news:95dohr$onl$1@news.xmission.com... > > The manual says the following about LRU's and CLEANERS > > To monitor the percentage of dirty pages in LRU queues, use the onstat -R > command. When the number of dirty pages consistent…
LRU,cleaner and buffer
CLEANERS should be >= LRUS in general though some have said that on a machine with only a few CPUS 4 CLEANERS per CPU seems to be a max also. I have not found this but then I run 28 CPU VPs on a 32 CPU box with 128 LRUS and CLEANERS. Art S. Kagel Murat YILDIZ wrote: > > How can…
Re: take long time to complete checkpoint
From: Thanh Ngo <t-ngo@ti.com> > >'online.log' shows me that it took about 77 seconds to complete a >checkpoint. >It is not like our other database >engines, it only took about 3 or 5 second to complete the checkpoint. Can >someone tell me how to lower the time >for this? Increa…
take long time to complete checkpoint
'online.log' shows me that it took about 77 seconds to complete a checkpoint. It is not like our other database engines, it only took about 3 or 5 second to complete the checkpoint. Can someone tell me how to lower the time for this? Increasing LRUS can help? We have Informix ve…
Re: CLEANERS
"William Rice" <ricew@operamail.com> wrote in message news:90isbi$1j4$1@nnrp1.deja.com... > In article <3a2c1dd0@news.iprimus.com.au>, > "Andrew Hamm" <ahamm@sanderson.net.au> wrote: > > hanna_shaw@my-deja.com wrote in message > <90gti5$gso$1@nnrp1.deja.com>... > > >Hi, > > > >…
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…
RE: LRUS, CLEANERS, BUFFERS and # of disks (dbspaces)
From: "Sinha, Niraj" <niraj.sinha@BondBook.com> > >I was under the impression that LRU shold not be set to 128. Should be >set to 127 to the max, as theres is sort of bug. It's just a spurious warning message you can ignore. But why not see if your port doesn't support more LRUs…
RE: LRUS, CLEANERS, BUFFERS and # of disks (dbspaces)
I was under the impression that LRU shold not be set to 128. Should be set to 127 to the max, as theres is sort of bug. I too have Buffere waits in my system, and I get the Buffer waits as soon as I reinitialize my system. I have LRUS=127 and LRU_MAX_DIRTY=2 and LRU_MIN_DIRTY=1, …
LRUS, CLEANERS, BUFFERS and # of disks (dbspaces)
I doubled BUFFERS on system because I noticed that BTR=bufwaits*100/(pagreads+bufwrits) is very bad. But there is no changes in BTR. I think that problem is in LRU queues. Is it possible to say what is the best number of LRUS and CLEANERS? Does it depend on number of disks and/…
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…
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…
Re: onconfig advise please
> By looking at ovbuff and the BTR (Buffer Turnover Rate) or BTF (Buffer > Turnover Frequency) you can determine whether the problem is not enough > buffers or LRU contention. If LRU contention increase LRUS and CLEANERS if > possible, if they are already maxed out (128 on 7.x/9…
performance with very active threads
Ray Canuel wrote in message <39B6574D.1213E610@informix.com>... > >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 >goo…
Bufwaits and #LRUs
Hi, The more LRUs the less bufwaits ? therefore, always 127 ? someone says 1000 buffer per LRU. I have 10000 buffers, so 10 LRU, but I have bufwaits. Is there another reason ? better to set 127 whichever #buffers ? Regards, Thanks, Manel Falcó…
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…
Re: Performance tuning 7.3 newbie questions
Gary Quiring wrote: > > We are running 7.3 IDS on SCO OpenServer 5.0.5. The checkpoints can be > fairly long at 34 seconds. The server is a Dell 6300 400mhz Xeon with 4 > chips and 4 gig of memory serving approx. 140 users. > We are going to move the Informix DB to a Sun box w…
Re: Regarding LRU,
From: Aboobacker V V <aboo@syd-co.au.dhl.com> > >May be a stupid question !!!, Pass. >Why there is a requirement for more than one LRU queue in Informix >Online. >With one LRU queue pair itself, cann't the buffer be managed?? It can, but the issue is do you want your hundreds…
Regarding LRU,
Hi All, May be a stupid question !!!, Why there is a requirement for more than one LRU queue in Informix Online. With one LRU queue pair itself, cann't the buffer be managed?? Regards Aboo…
Re: How to improve bufwaits ratio?
From: JasonYLPang@pg.SLR.com > >I found that my current bufwaits ratio was around 28% which is more than >7%. >How to improve it? More LRUS (and CLEANERS) ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at h…
Re: Performance problems with large SELECTS in 7.3x ?
Stefan Weideneder wrote: > > Hi, > > I tried to select some pages of a table that was a bit larger > than my buffer pool. I estimated that my statement will take > about 5 seconds but it took 12 seconds. > I found out, that the server spent approx. 7 seconds for > "buffer waits".…
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?…
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…
Ratio (bufwrites + pagreads)/buffwts
Dear Art, from the discussions in the iiug you seem to be a real expert on Informix problems. Therefore I'd like to ask you two questions: 1) you once wrote in the iiug that the number of buffwts should not exceed 7% of (bufwrites + pagreads), otherwise performance will suffer. …
RE: Number of LRUs, Cleaners & Buffers
You might change your LRU_MIN_DIRTY/LRU_MAX_DIRTY to 1/2 Before you do that how many buffers do you have? We tend to make BUFFERS/LRU's=1000 as a starting point. We do CLEANERS=LRUS as well. Then if there are still issues we tweak the numbers till we see what we like. Upgradi…
Number of LRUs, Cleaners & Buffers
I'm running informix 7.30 UC6 on a 4cpu Server (the engine is db- and app-server, 3 cpus are affinated, AFF_NPROCS=3), acutally I have 8 LRU-Queues and 4 cleaners. In a statement from Art S.Kagel I read that "If bufwaits exceeds 7% of (pagreads + bufwrits) you are probably suffer…
Re: Slowness
Leonids.Voroncovs@dati.lv wrote: > > "Art S. Kagel" wrote: > > > If you still have BR problems you can try increasing BUFFERS also > > and then you have to use the undocumented ONCONFIG parameter LRUPRIORITY > > to alter how clients select LRU queues to reduce contention. > > Oop…
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…
RE: What is bufwaits (onstat -p)
>===== Original Message From "Mark D. Stock" <mdstock@mydas.freeserve.co.uk> ===== >"Art S. Kagel" wrote: >> >> The bufwaits indicates when a thread has to wait to read a page into a >> buffer from disk usually this is caused by the LRU Queue to which the thread >> has hashed to …
Re: What is bufwaits (onstat -p)
"Art S. Kagel" wrote: > > The bufwaits indicates when a thread has to wait to read a page into a > buffer from disk usually this is caused by the LRU Queue to which the thread > has hashed to acquire a buffer being locked by another thread trying to do > the same thing or needing…
RE: What is bufwaits (onstat -p)
I have one question. From your message: -- Pages that get both update and read activity or pages that get updated by multiple users are the source of bufwaits. The odds of two users with incompatible access modes hitting the same page at the same time is little affected by the …
Re: What is bufwaits (onstat -p)
Bufwaits have little or nothing to do with LRU contention nor with reading in a page from disk. As Vinod said it does occur when one has to wait on a buffer because another is accessing it. The counter is not incremented because one waits to get access to an LRU. It is increme…
What is bufwaits (onstat -p)
The bufwaits indicates when a thread has to wait to read a page into a buffer from disk usually this is caused by the LRU Queue to which the thread has hashed to acquire a buffer being locked by another thread trying to do the same thing or needing to move a buffer from the 'clea…
What's the impact if CLEANERS >= LRUS ?
As he subject says. thanx…
LRU queues
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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…
Re: How do I check LRU contention - onstat -g spi ????
On Tue, 11 Apr 2000 13:30:59 -0400, "Art S. Kagel" <kagel@bloomberg.net> wrote: >bothwellno@spam.duke.edu wrote: > >> Art S. Kagel & Family <kagel@erols.com> wrote: >> : InfoJones wrote: >> : [output SNIPPED] >> >> : To determine whether buffer contention or LRU contention is in…
Re: How do I check LRU contention - onstat -g spi ????
bothwellno@spam.duke.edu wrote: > Art S. Kagel & Family <kagel@erols.com> wrote: > : InfoJones wrote: > : [output SNIPPED] > > : To determine whether buffer contention or LRU contention is involved > : try to calculate your buffer turnover rate: > > : Buffer Turnovers = (dskread…
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…
Re: How do I check LRU contention - onstat -g spi ????
Art S. Kagel & Family <kagel@erols.com> wrote: : InfoJones wrote: : [output SNIPPED] : To determine whether buffer contention or LRU contention is involved : try to calculate your buffer turnover rate: : Buffer Turnovers = (dskreads + bufwrits) / BUFFERS : BTR = (Buffer Turnove…
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…
Re: Long Checkpoints
Ulrich Eckhardt wrote: > > "Mark D. Stock" wrote: > > I don't subscribe to the idea of matching your physical log size to your > > average work load. What happens when your work load is a bit high? You > > have performance problems. > > > > I always create my physical log too big…
Re: Long Checkpoints
In article <38BE266E.C164B425@transcom.de>, Ulrich Eckhardt <Ulrich.Eckhardt@transcom.de> wrote: > Hi, > > i have a problem with long checkpoint runs on an informix 7.30 UC 10 > running on linux. (Machine is a PIII 500 with 512 MB Memory). > > Sometimes checkpoints takes 15 to …
Long Checkpoints
Hi, i have a problem with long checkpoint runs on an informix 7.30 UC 10 running on linux. (Machine is a PIII 500 with 512 MB Memory). Sometimes checkpoints takes 15 to 25 seconds. During this times i have approximately 2000 to 2300 dirty LRU queues. an onstat -FR (with only 2…
Shared Memory Parameters?
I am working with an existing database that has some onconfig parameters that I am questioning. One of our problems is extents, but another reason we get hammered during the day might be the following shm parameters. OL Engine Vers. 7.31 on HP 9000 Aprx. 400-600 users Database …
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…
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
Scott Huppert wrote: > > It's logical that turning the entire buffer pool every 10 minutes is > probably bad, but what is a reasonable time frame? Is there any rule of > thumb? On a busy server that is NOT primarily a DSS/DW server I'd like to see the buffer pool turnover rate …
Re: checkpoints taking as much as 25 secs
From: "Tam McLaughlin" <tamm@scotlegal.com> > >LRUS 8 Try more LRUS, something like 50. >LRU_MAX_DIRTY 20 >LRU_MIN_DIRTY 15 Try dropping these to 2 and 1, respectively. HTH. ______________________________________________________ Get Your Private, Free Email at…
Re: Buffer Waits Ratio
In article <82mqij$ibf$1@news.xmission.com>, Luse Harold <hluse@vth.colostate.edu> writes >We had 4 LRUS for 3 NUMCPUVPS and a buffer wait ratio (aka KBR for those >who know it by another name) > 25%. I increased the number of LRUS to 16 >and the ratio remained > 25%. After inc…
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…
ovbuff vs. fgwrites question
Bobby Medus <jeepin@eatmydirt.com> wrote in message news:382C304D.90240C61@texas.net... > This may be a stupid question but you know the old saying..... > > I noticed an increase in 'ovbuff' on the onstat -p. This is a very > small database running on NT and so I increased my b…
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…
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…
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…
Fg Writes
lower LRU_MAX_DIRTY, LRU_MIN_DIRTY. Make checkpoints more frequent either through CKPTINTVL or resizing the physical log. Increase BUFFERS, CLEANERS, LRUS. Those are the general answers (I can think of right away). LRU_M[IA][NX]_DIRTY - Control when your buffers are cleaned o…
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…
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…
RE: BUFFERS
I've heard the same is true for LRUs = 64 or 96..... I've been told to avoid those numbers..... as well as 128. -----Original Message----- From: Art S. Kagel [mailto:kagel@bloomberg.net] Sent: Wednesday, August 18, 1999 2:43 PM To: informix-list@iiug.org Subject: Re: BUFFERS Th…
BUFFERS
Art: FYI it looks like this LRUS=128 is fixed in 7.31.UC2. allen "Art S. Kagel" wrote: > > The maximum value of LRUS is 128 as for CLEANERS also. There is a bug in > all versions upto and including 7.24UC7 that reports a spurious error > message at startup time if you use 128…
Page cleaner configuration
I have heard that you should set the CLEANERS configuration variable equal to the LRUS variable. I have also heard that you should set CLEANERS equal to the number of chunks in the instance. Which is it?…
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.…
buffwaits
In article <7oj056$6g6u$1@newssvr04-int.news.prodigy.com>, "Dhanesh Kottile Veedu" <KVDHANESH@prodigy.net> wrote: > Is there any way to tune buffwaits? > > Yes, of course. First of all, you have to look at your LRUs. Generally speaking, LRUS=4*NUMCPUVPS is sometimes too low. I…
buffwaits & lockwaits
Dhanesh, Please post onstat -p output showing the problem. In general one can control the number of lockwaits by changing table lock modes from page to row and by reducing the duration of locks in applications programs. To reduce bufwaits one can increase the number of buffers…
Re: LRUs and Cleaners
Doug Agnew wrote: > > One of the comments made during the performance tuning presentation at SP99 > has left me with a small question. The comment was to the effect that a > good target value for LRUs was 1 LRU for every 750 buffers. That I > understand, and it seems the intent…
LRUs and Cleaners
One of the comments made during the performance tuning presentation at SP99 has left me with a small question. The comment was to the effect that a good target value for LRUs was 1 LRU for every 750 buffers. That I understand, and it seems the intention is to reduce the time re…
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…
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…
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…
Re: performance turning help
> My Informix seen to run slow and not taking > full CPU resource. I would ppreciate any help I can get on this problem. See recomendations for NOAGE param. > NOAGE 0 # Process aging Set to 1. It's critical for processes priority. > NUMAIOVPS 1 …
Re: Some performance questions
Paul watson wrote: > > [cutting] > > Hi Doug, LRUS=3D=3D64 is a 'magic' number. =20 > > [cutting] > > Wasn't there a posting recently claiming 96 was a also a magic number? Or = > am I going senile? There was one report of poor bufwaits performance at 96, I have not verified it …
Some performance questions
Currently my bufwaits are in excess of 10% of dskreads+bufwrits. I believe this to be too high (my LRUs are 64 -- and being changed tonight), but don't know what a 'good' value should be. Any suggestions?? What is the tradeoff when I'm increasing LRUs, while holding all other …
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: Out of buffer?
On Wed, 26 May 1999, Mark D. Stock wrote: > Xavier wrote: > > > > 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…
Re: Out of buffer?
Xavier wrote: > > 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 time…
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…
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: Re[4]: Long checkpoints (LRU_xxx_DIRTY/LRUS)--NETTYPE va
Hi, > Thanks already for your recommendations ! Further details follow : > > PHYSICAL LOG OVERFLOW : > ------------------------ > We never have checkpoints caused by the physical log being 75% full as > our physical log is so big (250M). Physical log overfl…
Re[4]: Long checkpoints (LRU_xxx_DIRTY/LRUS)--NETTYPE va
Thanks already for your recommendations ! Further details follow : PHYSICAL LOG OVERFLOW : ------------------------ We never have checkpoints caused by the physical log being 75% full as our physical log is so big (250M). Physical log overflows can hap…
Re[2]: Long checkpoints (LRU_xxx_DIRTY/LRUS)->NETTYPE values
Here is some additional information regarding these long checkpoints we have in our productional SAP R/3 environment (Informix 7.24.UC3). Our physical log is 250 MB, which is quite big (but I want to avoid physical log overflows by all means). The value for …
Re: RESIDENT and PDQ
Chuck Renaud wrote in message <7ddp91$hpf$1@news.xmission.com>... > >As for light scans--those only happen if the table being read is >larger than the buffer pool. So if you max out your buffers, you >won't get light scans unless they're huge tables... So, would this mean that …
Re: Re[2]: Long checkpoints (LRU_xxx_DIRTY/LRUS)--NETTYPE values
> Our physical log is 250 MB, which is quite big (but I want to avoid > physical log overflows by all means). The value for LOGBUFF is 128. Hm. I've never heard of a _physical_ log overflow. I take it then that you never have the physical log kick off a checkpoint? Perh…
Re: Long checkpoints (LRU_xxx_DIRTY / LRUS / CLEANERS adapted)
I'm swinging in the dark here, so all the usual disclaimers apply! :-) Have you tried reducing the checkpoint interval back down to 5 minutes or so? Perhaps having more frequent checkpoints will make them shorter. How big is your physical log? There is a chance that posting you…
Long checkpoints (LRU_xxx_DIRTY / LRUS / CLEANERS adapted)
We are having long checkpoints (around 20 seconds). The number of dirty pages to be written at checkpoint time does not even seem to play a major role. Our SUN Sparc Storage Arrays have enough NVRAM anyway to handle the chunk writes at checkpoint time. I h…
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…
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: onstat -F output
This reinforces the idea from yesterday, that you do not have enough pages updated between checkpoints to force LRU writes, given your current settings. Note that during the measured period, you have only 66,897 page writes. Owing to the imprecise amount of time ('almost an hou…
Delete
Hi. I've a question. When execute a delete by where on field not indexes, it sequential scan table' s page. Before to delete records, it casche pages in buffer pool ? Tank you.…
Re: onstat -F output
> Hi all, > I have Informix 7.30.UC2 running on SCO 5.04 and have noticed this on > my onstat -F output > > Fg Writes LRU Writes Chunk Writes > 0 0 18463 > > address flusher state data > 874484c4 0 I 0 = 0X0 > 87448974 1 …
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…
RE: Buffer Waits
> > > > > In article <79qhb8$fi$1@news.xmission.com>, > > > Dale Forrey <forrey@wsu.edu> wrote: > > > > > > > > Does a properly tuned Informix instance used primarily > > for decision > > > > support have a buffer wait count near 0? I am working on a relatively > > > > s…
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 There's a blurb about i…
Buffer Waits
Does a properly tuned Informix instance used primarily for decision support have a buffer wait count near 0? I am working on a relatively small data warehouse running on a 2 processor RS/6000 with 512 meg of real memory. I tried increasing the number of buffers but that had li…
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…
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?…
configuring LRU MIN/MAX,clarification
Could You please explain this with a little more detail? Also why pagreads and not bufreads ? TIA Sathish Sadagopan <snipped> If your bufwaits (onstat -p) is more than a few % of (pagreads + bufwrits) then you are experiencing LRU contention and need to increase LRUS. N.B. - …
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.…
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…
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…
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 …
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…
Page cleaners & LRU contention...
Hi guys and gals, ( On HP-UX 10.20 K-Series 6 CPU ODS 7.24UD6) I recently upped the number of page cleaners on a real time system with 16 chunks from 8 to 16. ( it seemed like a good idea ) It had 8 LRU queues LRUMAX/MIN at 8 and 4 and 30,000 BUFERS . i.e a ma…
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: Best database for web backend on Linux?
On Wed, 21 Oct 1998 13:03:49 +0000, Evan Carew <ecarew@yahoo.com> wrote: >Simply put, The main reason I have selected Sybase over Oracle in the >recent past has to do with cache management. In every case, if >you try to use Oracle stored procedures in the same environment with >…
Reducing Checkpoints duration
Hello all! I'm using INFORMIX Dyamic Server Workgroup Edition 7.20.UC2 on SCO OpenServer and I'm getting checkpoints that lasts until 20 seconds . I reduced LRU_MAX_DIRTY and LRU_MIN_DIRTY to 10 and 5 respectively and the CHKPTINTVL to 60. I'm still getting checkpoints around 1…
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…
Re: Checkpoint takes long
Kai Shen <shen@acer.de> wrote in article <36075023.82CCB1AD@acer.de>... > Hi, > > on our SCO 5.0.4 machine we are running ODS 7.20 UC3. During the day > when appr. 60-80 persons are using the machine, we permanently > experience checkpoints that take 10 seconds or longer. I tried…
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: Page cleaners
jasonharris@my-dejanews.com wrote: > > All, > > I have one question about page cleaners. As they run on CPU VP threads what is > the value in having more page cleaners that CPU VP threads? You need to look at a number of concepts to answer that. None of which I'm going to detail…
Re: Reducing checkpoint intervals...
Hi, in my opinion you must reduce LRU_MAX_DIRTY and LRU_MIN_DIRTY. It's not a good idea to reduce the time interval between the checkpoints because each checkpoint costs a lot of overhead ( thread-synchronisation and checkpoint-waits ). How about: http://www.weideneder.de/info…
Re: Reducing checkpoint intervals...
Hi all, If I'm wrong please correct me. Informix docs say that, i) Page cleaning (by CLEANERS) begins when LRU_MAX_DIRTY percent of the buffers managed by a queue are modified. ii) Page claning is no longer required when LRU_MIN_DIRTY percent of the buffers in an LRU queue are …
Re: Performance problems with large SELECTS in 7.3x ?
Stefan Weideneder wrote: > > Hi, > > I tried to select some pages of a table that was a bit larger > than my buffer pool. I estimated that my statement will take > about 5 seconds but it took 12 seconds. > I found out, that the server spent approx. 7 seconds for > "buffer waits".…
Performance problems with large SELECTS in 7.3x ?
Hi, I tried to select some pages of a table that was a bit larger than my buffer pool. I estimated that my statement will take about 5 seconds but it took 12 seconds. I found out, that the server spent approx. 7 seconds for "buffer waits". Now I added a few buffers to the buffer…
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: Informix System Hangs
> >We are running Informix version 7.24.UC5-1 on Solaris 2.6 on a Sun E5000. We > >are having multiple daily "pauses" of the database, where it seams a single > >oninit starts sucking up all the CPU time, and nothing else moves. After > >about a 2 minute period, the system retu…
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…
Re: latch/lock , buffer - questions.
Sadagopan, Sathish wrote: > > Hi All, > 1) When a thread needs a buffer to read in data , does it acquire any > latches/locks.How is the allocation done ? This is all explained in the Administrator's Guide. Basically the thread hashes into the LRU queues selecting a queue at …
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: onstat -g ses
>Hi, >In the onstat -g ses output , what is the basis for allocation of 'total >memory' ? >There is also the figure 'used memory' , why not just allocate required >memory ? Well, we could do that but then that would 1) fragment memory and 2) create bottlenecks. Memory in shared…
Re: Optimising IDS for RAID-5 ?
Andrew Lawrenson wrote: > > Does anyone have any clues as to how to best tune Informix (v7, currently > 7.23) to run on RAID-5, in terms of LRU's, CLEANERS, LRU_MIN/MAX_DIRTY, Read > Ahead, etc? I my case, this is all under NT 4.0 Tuning these things is very dependent on your g…
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: 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…
Re: Onstat -R
Hi Roger, The onstat -R commadn give you the listing of the LRU queue's and there status. Eachr LRU queue consists out of two parts. A free and a modified list. The letters f and m indicate wheter it is a f(ree) or m(odified) queue. The LRU length is the numer of pages that are …
Re: Onstat -R
rbruenin wrote: > > Can someone explain the onstat -R headings.. Is the percentage free or > used. Been digging thru the texts.. examples but little explanation? Sure. > INFORMIX-OnLine Version 7.24.FC4 -- On-Line -- Up 4 days 17:40:47 -- > 36320 Kbytes > > 8 buffer LRU queu…
Re: Onstat -R
rbruenin <rbruenin@concentric.net> offerred: +Can someone explain the onstat -R headings.. Is the percentage free or +used. Been digging thru the texts.. examples but little explanation? + +INFORMIX-OnLine Version 7.24.FC4 -- On-Line -- Up 4 days 17:40:47 -- +36320 Kbytes + +8…
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: What is good number for bufwaits?
Art S. Kagel <kagel@bloomberg.com> wrote in article <3558A5EA.1398@bloomberg.com>... ...snip... > 2) More LRUS == fewer bufwaits. This is critical! The more LRUS the > better. Avoid LRUS=64 and LRUS=96 as there seems to be a bug in the > LRU hash algorithm that causes bufwait…
Re: What is good number for bufwaits?
Colburn wrote: > > I just read the latest Informix TechNotes and they suggest bufwaits > should be 0. Mine is at 136,923 (server has only been up 7 hours). My > buffers are at 50,000 for 75 users on a 2Gb database on IUS 9.13. My > read a write cache rates are 99% & 95%. My r…
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: LRU Parameters
Also sprach "Art S. Kagel" <kagel@bloomberg.com> : :By the way: Joao's CLEANERS value is much too low. With 32 LRUs one :should have 32 CLEANERS unless one has > 32 chunks then add more than :32 cleaners. You should have: #Chunks <= #CLEANERS >= #LRUs to :minimize checkpoint …
Re: LRU Parameters
David Williams wrote: > > In article <01bd6c5b$658ff980$8da4d2cc@scott>, Scott Kolaya > <skolaya1@nycap.rr.com> writes > >Values of: > > > >LRU_MAX_DIRTY 3 > >LRU_MIN_DIRTY 2 > > > >are commonly used for OLTP processing to decrease the length of a > >checkpoint. How …
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…
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: KAIO vps, and bufwaits
David Williams wrote: > In article <6bq06q$8tp$1@news.xmission.com>, Art S. Kagel > <kagel@ns1.bloomberg.com> writes > >On Mon, 9 Feb 1998, Tony Tyrwhitt-Drake wrote: > >When a thread needs a buffer to update and the page is not already in > >the buffer pool the thread uses a …
Re: KAIO vps, and bufwaits
In article <6bq06q$8tp$1@news.xmission.com>, Art S. Kagel <kagel@ns1.bloomberg.com> writes > >On Mon, 9 Feb 1998, Tony Tyrwhitt-Drake wrote: > >> Art, >> >> I was intrigued by your mention of a bug in the LRU queue selection. But >> mostly by the number of queues you mentioned. P…
Re: KAIO vps, and bufwaits
Even LRUS need love... How many CLEANERS and LRUS per CPU VP are you running? I've been using the "rule" of CLEANERS = LRUS = CPU VPs. What you're saying about the hashing makes good sense, I'm just trying to find a starting point for our machines (one has high BUFWAITs > 18%)…
Re: Re[2]: KAIO vps, and bufwaits
Any special reason your suggest prime? Art S. Kagel wrote in message <6bq77p$k3r$1@news.xmission.com>... > >On Tue, 10 Feb 1998 davin_harvey@dsti.co.uk wrote: > >> Art >> >> Just a small question. Is there any reason for keeping the number of >> LRU queues to a p…
Re: Informix settings under high load.
Albert wisse wrote: [SNIP] > What I seen and have changed compared to a normal/intial Informix > setup. > - I got often "long transaction aborted" so I increased the logical > log size to eight times the amount under normal load then the problem > vanished. You might want to …
Re: Re[2]: KAIO vps, and bufwaits
On Tue, 10 Feb 1998 davin_harvey@dsti.co.uk wrote: > Art > > Just a small question. Is there any reason for keeping the number of > LRU queues to a power of two? Everybody seems to use 8,16,32, etc. > Just habit, or what? Naw, just dumb programmer habits. …
Re: KAIO vps, and bufwaits
On Mon, 9 Feb 1998, Tony Tyrwhitt-Drake wrote: > Art, > > I was intrigued by your mention of a bug in the LRU queue selection. But > mostly by the number of queues you mentioned. Personally, I have never set > LRUS to a number anything like as big as 32, let alone 128, prefering…
Re: Another checkpoint situation
At checkpoint time one page cleaner is assigned to queue up the addresses of modified buffers to the global file descriptors for its assigned chunk. (This assumes that you are not using Kernel IO) It appears that all of your work between the check- point was for one chunk and th…
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…
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…
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: Logical Logs -Explain
In article <3485C2BE.73FA@bloomberg.com>, "Art S. Kagel" <kagel@bloomberg.com> writes >Almost, Mark. It would be more accurate to say that a foreground write >happens when an application thread needs a buffer to write into and >cannot get access to one after a specified number o…
Re: Logical Logs -Explain
Mark Collins wrote: > > > Regarding Flushing of logs/buffers to disk > > 1)What is a FOREGROUND WRITE? > A foreground write is a very bad thing for performance. Basically, there are three ways > for modified pages to be written back to disk from the buffer cache: > 1.…
Re: Q about LatchWaits, BufWaits and LRU-Writes
Dirk Scheer wrote: [SNIP] > from 512 MB to 1 GB of memory and I've increased the BUFFERS from 40000 to > 200000. Now the performance is ok. But I wonder why the values of LatchWaits > and BufWaits are constantly growing and if this have still negative affects on > performance. S…
Re: es posible subir tablas a ram
Hola userios, (I'll not burden you with more bad Spanish) >if informix permit to locate a table in ram in transparent way for the >application. This is not explicitly possible in versions <= 7.2x, though frequently used tables should remain in the buffers via the LRU queueing…
Re: Performance problems on AIX 3.2 (RS6000)
In article <340C3A7E.7B24@bellsouth.net>, Daniel Gurian <dgurian@bellsouth.net> writes > >Has anyone seen this problem; I am looking for a solution >to this problem: Check points are taking 20 to 30 seconds >to complete. This is causing all processes to wait until the >check poi…
Re: onstat -u, B-flag
Alexander Selg wrote: > > Hello All ! > > The command "onstat -u" gives some information about the userthreads. In > the 2.column you can see the flags to each thread. The 1.position > indicates the resource a thread is waiting for. > My question is: if there is a "B" on the 1.po…
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…
Re: When does bufwaits get incremented ?
tony edwards wrote: > > Hey, > I've been trying to track down some information about when bufwaits is > incremented. I found the following in the ODS Admin guide... If after a limited number of attempts to find an unlocked queue, no free buffer has been found the thread …
Re: When does bufwaits get incremented ?
tony edwards wrote: > > Hey, > I've been trying to track down some information about when bufwaits is > incremented. I found the following in the ODS Admin guide... If after a limited number of attempts to find an unlocked queue, no free buffer has been found the thread …
Re: Mirroring
Jay Aymond wrote: > Is there some rule for defining how many LRU queues to have for a > certain number of buffers? Well, this came up in the optimization tutorial. One thing that we're going to try, as advised, is ramping up the queues to 128 for "large buffer" installs (or al…
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…
Now this is a cool tool!
This has nothing to do with Informix, but the product is just so cool I had to share it with you. http://www.vitalsigns.com/ When Informix gets their interfaces to work like this they won't be reporting slumped sales again...Maybe they could get an interface like this for OnLin…
Re: LRUS vs. CLEANERS
In article <33219A97.790C0F1B@www.weideneder.de>, Stefan Weideneder <stefan@www.weideneder.de> writes >KENDRICKS.CHERYL@heb.com wrote: >> >> The number of Cleaner's does not only depend on the number of disk but also >> the the number of LRU Queues (LRU). You should then set you …
LRUS vs. CLEANERS
KENDRICKS.CHERYL@heb.com wrote: > > The number of Cleaner's does not only depend on the number of disk but also > the the number of LRU Queues (LRU). You should then set you Cleaner value to > the number of Disk that are updated during a checkpoint only if LRUS is not > set to a …
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
David L. Kosenko wrote: > > If LRU_MAX_DIRTY is set to 5 with 10 LRUS, the start flush point is > going to be > essentially the same as a LRU_MAX_DIRTY of 5 with 20 LRUS. Why? > Because dirty > buffers are generally spread evenly across all Qs (we access LRUs > randomly, more > …
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
Mark D Stock wrote: > > That is, if LRU_MIN_DIRTY and LRU_MAX_DIRTY are both held > > constant, say 5 and 7 respectively, does a higher or lower LRU result > > in a shorter checkpoint duration? > > My feeling is that if you need to lower these parameters this much in order to > r…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
This is a multi-part message in MIME format. --------------C4C26D4394 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit David Williams wrote: > > In article <4rsf8p$kt@sjx-ixn4.ix.netcom.com>, Stuart Cracraft > <cracraft@ix.netcom.com> writes > >The…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
David Williams wrote: snip > LRU's too low means the there is contention among the queues and > Informix runs slower as processes have to wait before the can update > the queues. There is one mutex per queue which controls give thread > can update the queue. Remember que…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
Stuart Cracraft wrote: > The checkpoint always seems to occur at the interval and > not at the early 75% interval. > > Seems to me this means I could increase the checkpoint > interval some. No! This would result in longer checkpoints. All I know 300 secs is ideal for normal OL…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
>By the way, what is your checkpoint interval? >Are the checkpoints occurring after this intervall or do they occure >earlier, initiated by a 75% dirty Physical-Log-Buffer? The checkpoint interval is set to 300 seconds. The checkpoint always seems to occur at the interval and n…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
Stuart Cracraft wrote: > On an interactive time-sharing system attempting to service many > user's interactive GUI queries, what is the disadvantage of setting > LRU's too low? Could a low LRU be tied to a longer checkpoint > duration? In my opinion the disadvantage of setting …
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
Stuart Cracraft wrote: > > The On-Line manual on page 12-36 says LRUS should be either 4 or the > number of virtual cpus -- this is a very low number. > > Most of the Informix Press tuning books and chapters on tuning, say > LRUS should be equal to CLEANERS and shouldn't be too s…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
In article <4rsf8p$kt@sjx-ixn4.ix.netcom.com>, Stuart Cracraft <cracraft@ix.netcom.com> writes >The On-Line manual on page 12-36 says LRUS should be either 4 or the >number of virtual cpus -- this is a very low number. > >Most of the Informix Press tuning books and chapters on tu…
Re: Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
Stuart Cracraft wrote: > > > So far, setting LRU_MIN_DIRTY and LRU_MAX_DIRTY down to > 5 and 7 respectively, with CLEANERS at 29 and LRU > at 5 (LRU formerlyl at 16) has resulted in approximately 1/5th the > checkpoint durations of when CLEANERS was at 29 and LRU was at 16 > and…
Informix 7.1.2.UC1: LRUS in /usr/informix/etc/onconfig
The On-Line manual on page 12-36 says LRUS should be either 4 or the number of virtual cpus -- this is a very low number. Most of the Informix Press tuning books and chapters on tuning, say LRUS should be equal to CLEANERS and shouldn't be too small. This is typically a higher n…
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…
Re: LRU writes
On Thu, 2 May 1996, Mickey Mestel wrote: > brian, > > > We have never had anything BUT chunk writes, and are trying to make > > better use of our BUFFERS. Should we be trying to increase the number of > > queues, maintaining the number of buffers, until we just start seeing LRU…
Re: page cleaner #1 timed out
> From informix-list-owner@rmy.emory.edu Tue Apr 30 03:41:00 1996 > From: Guy Germonpre <germonpre_guy/dis@bekaert.com> > Subject: page cleaner #1 timed out > Date: 30 Apr 1996 07:43:59 GMT guy, > Online 5.03.UD2 on Compaq proliant 4500. From time to time we get the > error > "E…
Re: Good Buffer Size For Tuning Informix?
Chris Jenkins (chrisj@informix.com) wrote: : The only really important factor in determining the number of buffers is : the read and write cache hit ratios reported by tbstat -p. Keep : increasing the number of buffers until these cache hit rates do not : increase when the system…
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: Keeping clean pages in shared memory
> If you have a DSS app, the buffer pool does not become dirty, so the > LRU_MAX_DIRTY will not have any impact. ...unless of course you're generating temp tables. Which just about all apps do at some time or another. akent@cix.compulink.co.uk (Andy Kent) ----------------------…
Re: Keeping clean pages in shared memory
Andy Kent writes: |> OK, so every Online person knows how the most frequently-used pages are |> encouraged to stay in shared memory by means of LRU queues. |> |> That's fine for dirty pages. A potentially dumb question then: what |> about clean ones? Does OnLine have a mechanism…
Re: Keeping clean pages in shared memory
We had a similar discussion on our project not only about read pages (which as Malcolm points out is moved to the beginning of the queue when read) but what happens when the page cleaner flushes a dirty buffer? Does the buffer end up in the free list or can it still be used to do…
Re: Keeping clean pages in shared memory
Andy, The LRU queue mechanisms apply to both clean and dirty pages. Malcolm Weallans Online Database Consultancy 2 Arkley Court Maidenhead Berks SL6 2YR Phone 0628-72154 Fax 0628-37463 CIX - onlinedbc…
Re: LRU writes
Graeme Sargent writes: |> Can anyone explain exactly what triggers an LRU write in Informix- |> OnLine, or what the distinction is between LRU writes and Idle writes? |> |> According to the documentation (and the Informix training courses) the |> only thing that triggers an LRU w…