Performance Issues

Hi, We are currently running informix on E5000 system which 4 CPUs and 2 MB of RAM. We have got some performance problems on this system. The performance of the application running on this system is not comparable what we had expected. The system is a batch processing system. We analys the system and unable to find any suitable solution to improve performance. The listing below shows the output of onstat -p. ================================================ dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached 4043750739 59853281 604861800 0.00 122732622 70823866 1106184833 88.90 isamtot open start read write rewrite delete commit rollbk 1018217434 2365010653 400986740 1380105727 152884987 127463044 8803283 39620880 366903 gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs 0 0 0 0 0 0 0 ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes 0 0 0 2000759.78 364288.72 8828 18200 bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans 179603434 0 3227542476 0 0 18465 9537417 11416813 ixda-RA idx-RA da-RA RA-pgsused lchwaits 1492613204 3357525 1959151075 3444017014 21784573 and the following listing shows our onconfig file ================================================== #*********************************************************************** *** # # INFORMIX SOFTWARE, INC. # # Title: onconfig.std # Description: Informix Dynamic Server Configuration Parameters # #*********************************************************************** *** # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace name ROOTPATH /export/home/ifmxdata/s01_01 # Path for device containing root dbspace ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes) ROOTSIZE 2000000 # Size of root dbspace (Kbytes) # Disk Mirroring Configuration Parameters MIRROR 0 # Mirroring flag (Yes = 1, No = 0) MIRRORPATH # Path for device containing mirroredroot MIRROROFFSET 0 # Offset into mirrored device (Kbytes) # Physical Log Configuration PHYSDBS rootdbs # Location (dbspace) of physical log PHYSFILE 1000000 # Physical log file size (Kbytes) # Logical Log Configuration LOGFILES 600 # Number of logical log files LOGSIZE 20000 # Logical log size (Kbytes) # Diagnostics MSGPATH /export/home/informix/online.log # System message log file path CONSOLE /dev/console # System console message path ALARMPROGRAM /export/home/informix/etc/log_full.sh # Alarm programpath SYSALARMPROGRAM /export/home/informix/etc/evidence.sh # System Alarm program path TBLSPACE_STATS 1 # System Archive Tape Device TAPEDEV /export/home/ifmxdata/tape0 # Tape device path TAPEBLK 16 # Tape block size (Kbytes) TAPESIZE 90000000 # Maximum amount of data to put on tape (Kbytes) # Log Archive Tape Device LTAPEDEV /export/home/ifmxdata/tape1 # Log tape device path LTAPEBLK 16 # Log tape block size (Kbytes) LTAPESIZE 40000000 # Max amount of data to put on log tape (Kbytes) # Optical STAGEBLOB # Informix Dynamic Server/Optical staging area # System Configuration SERVERNUM 0 # Unique id corresponding to a DynamicServer instance DBSERVERNAME prime # Name of default database server DBSERVERALIASES kocprime # List of alternatedbservernames DEADLOCK_TIMEOUT 60 # Max time to wait of lock indistributed env. RESIDENT 0 # Forced residency flag (Yes = 1, No = 0) MULTIPROCESSOR 1 # 0 for single-processor, 1 for multi-processor NUMCPUVPS 4 # Number of user (cpu) vps SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vpsto one NOAGE 1 # Process aging AFF_SPROC 0 # Affinity start processor AFF_NPROCS 0 # Affinity number of processors # Shared Memory Parameters LOCKS 5000000 # Maximum number of locks BUFFERS 400000 # Maximum number of shared buffers NUMAIOVPS 2 # Number of IO vps PHYSBUFF 512 # Physical log buffer size (Kbytes) LOGBUFF 512 # Logical log buffer size (Kbytes)LOGSMAX 600 # Maximum number of logical log files CLEANERS 32 # Number of buffer cleaner processes SHMBASE 0xa000000 # Shared memory base address SHMVIRTSIZE 128000 # initial virtual shared memory segmentsize SHMADD 32000 # Size of new shared memory segments (Kbytes) SHMTOTAL 0 # Total shared memory (Kbytes). 0=>unlimited CKPTINTVL 300 # Check point interval (in sec) LRUS 127 # Number of LRU queues LRU_MAX_DIRTY 10 # LRU percent dirty begin cleaning limit LRU_MIN_DIRTY 5 # LRU percent dirty end cleaning limit LTXHWM 50 # Long transaction high water markpercentage LTXEHWM 60 # Long transaction high water mark (exclusive) TXTIMEOUT 0x12c # Transaction timeout (in sec) STACKSIZE 32 # 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 workerthreads ON_RECVRY_THREADS 1 # Default number of online workerthreads # 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 /export/home/informix/etc/dr.lostfound # DR lost+foundfile 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 5 # DS lockwait timeout (seconds) CDR_QUEUEMEM 4096 # Maximum amount of memory for any CDR queue (Kbytes)CDR_LOGDELTA