RE: Need help!! Sql to Informix Migration
As mentioned previously, you did not give us enough info to work with,
but you can also play with
SHMVIRTSIZE for more virtual memory, and the read ahead settings
(RA_....)
Depends on what is is you want to do.
-----Original Message-----
From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org]
On Behalf Of Savio Pinto (s)
Sent: 18 April 2005 06:27 PM
To: Unholy; informix-list@iiug.org
Subject: RE: Need help!! Sql to Informix Migration
you may need to capture the query plan by adding the {+ explain }
optimizer hints in the queries, and then analyze the plan for any
changes to the queries or to make sure if an index is needed.
-----Original Message-----
From: owner-informix-list@iiug.org
[mailto:owner-informix-list@iiug.org]On Behalf Of Unholy
Sent: Monday, April 18, 2005 3:10 AM
To: informix-list@iiug.org
Subject: Need help!! Sql to Informix Migration
Hi, I have developed a program that runs under sql Server, and it runs
really fast...... The problem is that now, I have to change the DBMS to
Informix.
I installed Informix under W2000, and also under W2003, and with it the
program is really slow, as much as 10 times slower than when it was
running under SQl.
I think that Informix should be faster, and I think that i hace to
condigure it, but i do not have so much experience as with sql... can
you help me??
This is my ONCONFIG file
#***********************************************************************
***
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig.std
# Description: Informix Dynamic Server Configuration Parameters
#
#***********************************************************************
***
# Root Dbspace Configuration
ROOTNAME rootdbs # Root dbspace name
ROOTPATH C:\\IFMXDATA\\nomina\\rootdbs_dat.000 # Path for device containing root
dbspace
ROOTOFFSET 0 # Offset of root dbspace into device
(Kbytes)
ROOTSIZE 51200 # Size of root dbspace (Kbytes)
# Disk Mirroring Configuration Parameters
MIRROR 1 # Mirroring flag (Yes = 1, No = 0)
MIRRORPATH D:\\IFMXDATA\\nomina\\rootdbs_mirr.000
# Path for device containing mirrored
root
MIRROROFFSET 0 # Offset into mirrored device (Kbytes)
# Physical Log Configuration
PHYSDBS rootdbs # Location (dbspace) of physical log
PHYSFILE 2000 # Physical log file size (Kbytes)
# Logical Log Configuration
LOGFILES 7 # Number of logical log files
LOGSIZE 2000 # Logical log size (Kbytes)LOG_BACKUP_MODE MANUAL # Logical log backup mode (MANUAL,
CONT)
# Diagnostics
MSGPATH C:\\PROGRA~1\\Informix\\nomina.log # System message log
file path
CONSOLE C:\\PROGRA~1\\Informix\\connomina.log # System console
message path
# To automatically backup logical logs, edit alarmprogram.bat and set
# BACKUPLOGS=Y
ALARMPROGRAM C:\\PROGRA~1\\Informix\\etc\\alarmprogram.bat # Alarm
program path
TBLSPACE_STATS 1 # Maintain tblspace statistics
# System Diagnostic Script.
# SYSALARMPROGRAM - Full path of the system diagnostic script (e.g.
# c:\\informix\\etc\\evidence.bat.) Set this parameter
# if you want a different Diagnostic Script than
# {INFORMIXDIR}\\etc\\evidence.bat, which is default.
# System Archive Tape Device
TAPEDEV \\\\.\\TAPE0 # Tape device path
TAPEBLK 16 # Tape block size (Kbytes)
TAPESIZE 10240 # Maximum amount of data to put on tape
(Kbytes)
# Log Archive Tape Device
LTAPEDEV NUL # Log tape device path
LTAPEBLK 16 # Log tape block size (Kbytes)
LTAPESIZE 10240 # Max amount of data to put on log tape
(Kbytes)
# Optical
STAGEBLOB # Informix Dynamic Server/Optical
staging area
OPTICAL_LIB_PATH # Location of Optical Subsystem driver
DLL
# System Configuration
SERVERNUM 1 # Unique id corresponding to a serverinstance
DBSERVERNAME nomina # Name of default Dynamic Server
DBSERVERALIASES # List of alternate dbservernames
NETTYPE soctcp,1,,NET # Override sqlhosts nettype parameters
DEADLOCK_TIMEOUT 10 # Max time to wait of lock indistributed env.
RESIDENT 0 # Forced residency flag (Yes = 1, No =
0)
MULTIPROCESSOR 0 # 0 for single-processor, 1 formulti-processor
NUMCPUVPS 1 # Number of user (cpu) vps
SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vpsto one
NOAGE 0 # Process aging
AFF_SPROC 0 # Affinity start processor
AFF_NPROCS 0 # Affinity number of processors
# Shared Memory Parameters
LOCKS 2000 # Maximum number of locks
BUFFERS 2000 # Maximum number of shared buffers
NUMAIOVPS 1 # Number of IO vps
PHYSBUFF 32 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)
CLEANERS 1 # Number of buffer cleaner processes
SHMBASE 0xc000000 # Shared memory base address
SHMVIRTSIZE 8192 # initial virtual shared memory segmentsize
SHMADD 8192 # Size of new shared memory segments
(Kbytes)
SHMTOTAL 0 # Total shared memory (Kbytes).
0=>unlimited
CKPTINTVL 300 # Check point interval (in sec)
LRUS 8 # Number of LRU queues
LRU_MAX_DIRTY 60.000000 # LRU percent dirty begin cleaninglimit
LRU_MIN_DIRTY 50.000000 # LRU percent dirty end cleaning limit
TXTIMEOUT 0x12c # Transaction timeout (in sec)
STACKSIZE 64 # Stack size (Kbytes)
# Dynamic Logging
# DYNAMIC_LOGS:
# 2 : server automatically add a new logical log when necessary.
(ON)
# 1 : notify DBA to add new logical logs when necessary. (ON)
# 0 : cannot add logical log on the fly. (OFF)
#
# When dynamic logging is on, we can have higher values for
LTXHWM/LTXEHWM,
# because the server can add new logical logs during long transaction
rollback.
# However, to limit the number of new logical logs being added,
LTXHWM/LTXEHWM
# can be set to smaller values.
#
# If dynamic logging is off, LTXHWM/LTXEHWM need to be set to smaller
values
# to avoid long transaction rollback hanging the server due to lack of
logical
# log space, i.e. 50/60 or lower.
DYNAMIC_LOGS 2
LTXHWM 70
LTXEHWM 80
# System Page Size
# BUFFSIZE - Dynamic Server no longer supports this configuration
parameter.
# To determine the page size used by Dynamic Server on your
platform
# see the last line of output fro