SEO

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 [mailtowner-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
[mailtowner-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 server
instance
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 in
distributed env.
RESIDENT 0 # Forced residency flag (Yes = 1, No =
0)

MULTIPROCESSOR 0 # 0 for single-processor, 1 for
multi-processor
NUMCPUVPS 1 # Number of user (cpu) vps
SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps
to 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 segment
size
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 cleaning
limit
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 from the command, 'onstat -b'.


# Recovery Variables
# OFF_RECVRY_THREADS:
# Number of parallel worker threads during fast recovery or an offline
restore.
# ON_RECVRY_THREADS:
# Number of parallel worker threads during an online restore.

OFF_RECVRY_THREADS 10 # Default number of offline worker
threads
ON_RECVRY_THREADS 1 # Default number of online worker
threads

# Data Replication Variables
DRINTERVAL 30 # DR max time between DR buffer flushes
(in sec)
DRTIMEOUT 30 # DR network timeout (in sec)
DRLOSTFOUND \tmp # DR lost+found file path

# CDR Variables
CDR_EVALTHREADS 1,2 # evaluator threads
(per-cpu-vp,additional)
CDR_DSLOCKWAIT 5 # DS lockwait timeout (seconds)
CDR_QUEUEMEM 4096 # Maximum memory for any CDR queue
(Kbytes)
CDR_QHDR_DBSPACE # CDR queue dbspace (default same as
catalog)
CDR_QDATA_SBSPACE # CDR queue smart blob space
CDR_NIFCOMPRESS 0 # Link level compression (-1 never, 0
none, 9 max)

# Backup/Restore variables
BAR_ACT_LOG C:\PROGRA~1\Informix\bar_nomina.log
#Path of log file for onbar.exe
BAR_MAX_BACKUP 0
BAR_RETRY 1
BAR_NB_XPORT_COUNT 10
BAR_XFER_BUF_SIZE 15
BAR_BSALIB_PATH C:\ISM\2.20\bin\libbsa.dll # Location of ISM XBSA DLL

RESTARTABLE_RESTORE on #To support restartable
restore..values on/off

# Informix Storage Manager variables
ISM_DATA_POOL ISMData
ISM_LOG_POOL ISMLogs

# Read Ahead Variables
RA_PAGES 4 # Number of pages to attempt to read
ahead
RA_THRESHOLD 2 # Number of pages left before next
group

# DBSPACETEMP:
# Dynamic Server equivalent of DBTEMP for SE. This is the list of
dbspaces
# that the Dynamic Server SQL Engine will use to create temp tables
etc.
# If specified it must be a colon separated list of dbspaces that exist
# when the Dynamic Server system is brought online. If not specified,
or if
# all dbspaces specified are invalid, various ad hoc queries will
create
# temporary files in /tmp instead.

DBSPACETEMP # Default temp dbspaces

# DUMP*:
# The following parameters control the type of diagnostics information
which
# is preserved when an unanticipated error condition (assertion
failure) occurs
# during Dynamic Server operations.
# For DUMPSHMEM, DUMPGCORE and DUMPCORE 1 means Yes, 0 means No.

DUMPDIR C:\tmp # Preserve diagnostics in this
directory
DUMPSHMEM 1 # Dump a copy of shared memory
DUMPGCORE 0 # Dump a core image using 'gcore'
DUMPCORE 0 # Dump a core image (Warning:this
aborts Dynamic
DUMPCNT 1 # Number of shared memory or gcore
dumps for
# a single user's session

FILLFACTOR 90 # Fill factor for building indexes

# method for Dynamic Server to use when determining current time
USEOSTIME 0 # 0: use internal time(fast), 1: get
time from OS(slow)

# Parallel Database Queries (pdq)
MAX_PDQPRIORITY 100 # Maximum allowed pdqpriority
DS_MAX_QUERIES 32 # Maximum number of decision support
queries
DS_TOTAL_MEMORY 4096 # Decision support memory (Kbytes)
DS_MAX_SCANS 1048576 # Maximum number of decision support
scans
DATASKIP off # List of dbspaces to skip

# OPTCOMPIND
# 0 => Nested loop joins will be preferred (where
# possible) over sortmerge joins and hash joins.
# 1 => If the transaction isolation mode is not
# "repeatable read", optimizer behaves as in (2)
# below. Otherwise it behaves as in (0) above.
# 2 => Use costs regardless of the transaction isolation
# mode. Nested loop joins are not necessarily
# preferred. Optimizer bases its decision purely
# on costs.
OPTCOMPIND 0 # To hint the optimizer

DIRECTIVES 1 # Optimizer DIRECTIVES ON (1/Default)
or OFF (0)

ONDBSPACEDOWN 2 # Dbspace down option: 0 = CONTINUE, 1
= ABORT, 2 = WAIT
OPCACHEMAX 0 # Maximum optical cache size (Kbytes)

# HETERO_COMMIT (Gateway participation in distributed transactions)
# 1 => Heterogeneous Commit is enabled
# 0 (or any other value) => Heterogeneous Commit is disabled
HETERO_COMMIT 0

SBSPACENAME sbspace # Default sbspace

BLOCKTIMEOUT 3600 # Default timeout for system block

# Optimization goal: -1 = ALL_ROWS(Default), 0 = FIRST_ROWS
OPT_GOAL -1

ALLOW_NEWLINE 0 # embedded newlines(Yes = 1, No = 0 or
anything but 1)
SYSSBSPACENAME sbspace # Default System sbspace

#
# The following are default settings for enabling Java in the database.
#
#VPCLASS jvp,num=1 # Number of JVPs to start with
JVPJAVAHOME C:\PROGRA~1\Informix\extend\krakatoa\jre
# JDK installation root directory
JVPHOME C:\PROGRA~1\Informix\extend\krakatoa
# Krakatoa installation directory
JVPLOGFILE C:\PROGRA~1\Informix\extend\krakatoa\nomina_jvp.lo g
# VP log file
JVPPROPFILE C:\PROGRA~1\Informix\extend\krakatoa\.jvpprops_nom ina
# JVP property file
JDKVERSION 1.3 # JDK version supported by this server

# The path to the JRE libraries relative to JVPJAVAHOME
JVPJAVALIB \bin\
JVPJAVAVM hpi;server;verify;java;net;zip;jpeg
# Classpath to use upon Java VM start-up (use _g version for debugging)
JVPCLASSPATH
C:\PROGRA~1\Informix\extend\krakatoa\krakatoa.jar; C:\PROGRA~1\Informix\e
xtend\krakatoa\jdbc.jar


Thanks a lot.


sending to informix-list

sending to informix-list