RE: Reducing checkpoints

Hello: Execute: onstat -a And it sends that information saludos ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- ---------------- "Lo mas importante en la comunicacion es tener la capacidad de escuchar lo que no se dice ".... Peter Drucker Este mensaje está dirigido solamente para el uso del destinatario previsto y puede contener información que es PRIVILEGIADA y/o CONFIDENCIAL. Si usted no es el destinatario previsto, se le notifica por este medio, que cualquier uso, difusión, acceso o copia de esta comunicación está prohibida terminantemente. Si usted ha recibido esta comunicación por error, destruya por favor todas las copias de este mensaje y de sus adjuntos y notifíquenos inmediatamente. -----Mensaje original----- De: informix-list-bounces@iiug.org [mailto:informix-list-bounces@iiug.org] En nombre de PapaKiKi Enviado el: Lunes, 19 de Junio de 2006 03:13 p.m. Para: informix-list@iiug.org Asunto: Reducing checkpoints Hi,i have a database with 80gigabytes of data with 360users and up to 400 when at peak.I use IDS 7.31 running on HP-UX 11.0 and 8 Gig of memory.The checkpoints get to as high as 58sec at peak periods .Users often run out of connections into informix.How can i reduce these checkpoints to acceptable levels like 3seconds.What others measures can help me.Below is the configuration from the onconfig.live in informix ******************************************************************** # # 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 rootdbspace 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 mirroredroot MIRROROFFSET 0 # Offset into mirrored device (Kbytes) # Physical Log Configuration# 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 pathSYSALARMPROGRAM /u/informix/etc/evidence.sh # System Alarm program path TBLSPACE_STATS 0 # System Archive Tape Device TAPEDEV /dev/rmt/c5t3d0BEST # Tape device path TAPEBLK 6144 # Tape block size (Kbytes)TAPEDEV /dev/rmt/c5t3d0BEST # 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/c5t4d0BEST dev/rmt/1m # Log tape device pat LTAPEBLK 6144 # Log tape block size (Kbytes) LTAPESIZE 80000000 # Max amount of data to put on log tape (Kbytes) # Optical STAGEBLOB # Informix Dynamic Server/Optical staging area # System Configuration SERVERNUM 2 # Unique id corresponding to a Dynamic Serverinstance DBSERVERNAME ok_srvr # Name of default database server DBSERVERALIASES ok_tcp # List of alternate dbservernames NETTYPE ipcshm,1,800,CPU # Configure poll thread(s) for nettype NETTYPE soctcp,1,100,NET # Configure poll thread(s) fornettype DEADLOCK_TIMEOUT 60 # Max time to wait of lock indistributed env. RESIDENT 0 # Forced residency flag (Yes = 1, No =0)ERVERNUM 2 # 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,1,800,CPU # Configure poll thread(s) for nettype NETTYPE soctcp,1,100,NET # Configure poll thread(s) fornettype 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 formulti-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 500000 # Maximum number of locks BUFFERS 200000 # Maximum number of shared buffers NUMAIOVPS 8 # Number of IO vps PHYSBUFF 128 # Physical log buffer size (Kbytes)CKS 500000 # 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 segmentsize 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 cleaninglimit LRU_MIN_DIRTY 0 # 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 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 # 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'.