Re: Perfomance Tuning
Guys thanks for your contributions.
there are some points that have helped me like, A checkpoint cannot
proceed while a user is in a critical session.Have been actin on this.
Thanks guys.
"Dirk Moolman" <DirkM@mxgroup.co.za> wrote in message news:<br7lpe$sc7$1@terabinaries.xmission.com>...
> You say showing signs of slowing down. You need to know what those
> plus minus 300 users are running on your server. One thing to
> investigate - are they running any / more reports than they normally do
> ? Any new batch processes ?
> These things can have a big impact on system performance.
>
>
> -----Original Message-----
> From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org]
> On Behalf Of Bonny
> Sent: Wednesday, December 10, 2003 12:47 PM
> To: informix-list@iiug.org
> Subject: Perfomance Tuning
>
> I have IDS 7.31 running on HP-UX 11.0 and 4 Gig of memory.
>
> I have a 40 Gig database with on average 260 users and at peak about
> 315 users.
> I want to tune my database , as it has shown signs of slowing down
> recently.
> Checkpoints are taking on average 10 seconds,under normal processing
> there should be 6 seconds.
> I have posted my onconfig file,onstat -p .What parameters should i
> consider for tuning both from the Informix side and Unix side.
>
> Onconfig
>
> #***********************************************************************
> ***
> #
> # INFORMIX SOFTWARE, INC.
> #
> # Title: onconfig.std
> # Description: Informix Dynamic Server Configuration Parameters
> #
> #***********************************************************************
> ***
>
> # Root Dbspace Configuration
>
> ROOTNAME rootdbs # Root dbspace name
> ROOTPATH /dev/rootdbs # Path for device containing root> dbspace
> ROOTOFFSET 0 # Offset of root dbspace into device
> (Kbytes)
> ROOTSIZE 1000000 # Size of root dbspace (Kbytes)>
> # Disk Mirroring Configuration Parameters
>
> MIRROR 0 # Mirroring flag (Yes = 1, No = 0)
> MIRRORPATH # Path for device containing mirrored> root
> MIRROROFFSET 0 # Offset into mirrored device (Kbytes)>
> # Physical Log Configuration
>
> PHYSDBS rootdbs # Location (dbspace) of physical log
> PHYSFILE 250000 # Physical log file size (Kbytes)>
> # Logical Log Configuration
>
> LOGFILES 30 # Number of logical log files
> LOGSIZE 5000 # Logical log size (Kbytes)>
> # Diagnostics
>
> MSGPATH /u/informix/online.log # System message log file path
> CONSOLE /dev/console # System console message path
> ALARMPROGRAM /u/informix/etc/log_full.sh # Alarm program path> SYSALARMPROGRAM /u/informix/etc/evidence.sh # System Alarm program
> path
> TBLSPACE_STATS 0>
> # System Archive Tape Device
>
> TAPEDEV /dev/rmt/c8t3d0BEST # Tape device path
> TAPEBLK 6144 # Tape block size (Kbytes)
> TAPESIZE 80000000 # Maximum amount of data to put on
> tape (Kbytes)>
> # Log Archive Tape Device
>
> LTAPEDEV /dev/rmt/1m # Log tape device pat
> LTAPEBLK 1024 # Log tape block size (Kbytes)
> LTAPESIZE 4000000 # Max amount of data to put on log
> tape (Kbytes)>
> # Optical
>
> STAGEBLOB # Informix Dynamic Server/Optical
> staging area
>
> # System Configuration
>
> SERVERNUM 1 # Unique id corresponding to a Dynamic> Server instance
> DBSERVERNAME ok_srvr # Name of default database server
> DBSERVERALIASES ok_tcp # List of alternate dbservernames
> NETTYPE ipcshm,1,500,CPU # Configure poll thread(s) for> nettype
> NETTYPE soctcp,1,5,NET # Configure poll thread(s) for nettype
> DEADLOCK_TIMEOUT 60 # Max time to wait of lock in> distributed env.
> RESIDENT -1 # Forced residency flag (Yes = 1, No =
> 0)
>
> MULTIPROCESSOR 1 # 0 for single-processor, 1 for> multi-processor
> NUMCPUVPS 2 # Number of user (cpu) vps
> SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps> to one
>
> NOAGE 1 # Process aging
> AFF_SPROC 0 # Affinity start processor
> AFF_NPROCS 0 # Affinity number of processors>
> # Shared Memory Parameters
>
> LOCKS 400000 # Maximum number of locks
> BUFFERS 200000 # Maximum number of shared buffers
> NUMAIOVPS 8 # Number of IO vps
> PHYSBUFF 128 # Physical log buffer size (Kbytes)
> LOGBUFF 128 # Logical log buffer size (Kbytes)> LOGSMAX 100 # Maximum number of logical log files
> CLEANERS 127 # Number of buffer cleaner processes
> SHMBASE 0x0 # Shared memory base address
> SHMVIRTSIZE 300000 # initial virtual shared memory> segment size
> SHMADD 40000 # Size of new shared memory segments
> (Kbytes)
> SHMTOTAL 0 # Total shared memory (Kbytes).
> 0=>unlimited
> CKPTINTVL 360 # Check point interval (in sec)
> LRUS 127 # Number of LRU queues
> LRU_MAX_DIRTY 1 # LRU percent dirty begin cleaning> limit
> LRU_MIN_DIRTY 0 # LRU percent dirty end cleaning limit
> LTXHWM 50 # Long transaction high water mark> percentage
> LTXEHWM 60 # Long transaction high water mark
> (exclusive)
> TXTIMEOUT 0x12c # Transaction timeout (in sec)
> STACKSIZE 64 # Stack size (Kbytes)>
> # 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
> # DRAUTO: 0 manual, 1 retain type, 2 reverse type
> DRAUTO 0 # DR automatic switchover
> DRINTERVAL 30 # DR max time between DR buffer
> flushes (in sec)
> DRTIMEOUT 30 # DR network timeout (in sec)
> DRLOSTFOUND /u/informix/etc/dr.lostfound # DR lost+found file path>
> # CDR Variables
> CDR_LOGBUFFERS 2048 # size of log reading buffer pool
> (Kbytes)
> CDR_EVALTHREADS 1,2 # evaluator threads
> (per-cpu-vp,additional)
> CDR_DSLOCKWAIT