"oncheck -pc" Problem

After the our last Informix migration on July we have a problem when we execute "oncheck -pc DBName" to view the state of one database. Sometimes gets a fast and a correct response and sometimes (1 over 3) gets a long wait (10 seconds aprox.) and gives the message "nnnn Memory Fault (coredump)" (nnnn = numeric value). This seems happen no depending on time to execute, on database or the system load. Can someone give me a help? It's a Informix or Unix memory problem? A copy of our "onconfig" file is at the end of this mail. We have: Operating System: Digital UNIX V4.0D (Rev. 878); Informix version: IDS 7.30.FC7-1 for Alpha Models (Class D) Digital Unix v.4.0D Instaled Memory: 512 Mb Sorry about my english and Thanxs!! ---------------------------------------------------------------------------- ----------------------------------- Adam Bover i Doga EMail: abover@miquel.es Miquel Alimentaci' Grup, S.A. Web: http://www.miquel.es/ Vilamalla (Girona) "Finding the answer it's a human obsesion", Estonia (Marillion) ;-) ---------------------------------------------------------------------------- ----------------------------------- ---------------------------------------------------------------------------- -------------------------------------------------------------------------- #************************************************************************** # # INFORMIX SOFTWARE, INC. # # Title: onconfig.std # Description: Informix Dynamic Server Configuration Parameters # #************************************************************************** # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace name ROOTPATH /usr/informix/dades/raw_rz26d.lnk # Path for device containing root dbspace ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes) ROOTSIZE 500000 # 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 150000 # Physical log file size (Kbytes)# Logical Log Configuration LOGFILES 15 # Number of logical log files LOGSIZE 20000 # Logical log size (Kbytes)# Diagnostics MSGPATH /usr/informix/online.log # System message log file path CONSOLE /dev/console # System console message path ALARMPROGRAM /usr/informix/etc/log_full.sh # Alarm program pathSYSALARMPROGRAM /usr/informix/etc/evidence.sh # System Alarm program path TBLSPACE_STATS 1# System Archive Tape Device TAPEDEV /dev/rmt0h # Tape device path TAPEBLK 16 # Tape block size (Kbytes) TAPESIZE 40000000 # Maximum amount of data to put on tape (Kbytes)# Log Archive Tape Device LTAPEDEV /dev/null # Log tape device path LTAPEBLK 16 # Log tape block size (Kbytes) LTAPESIZE 40000000 # Max amount of data to put on log tape (Kbytes) # OpticalSTAGEBLOB # Informix Dynamic Server/Optical staging area # System Configuration SERVERNUM 0 # Unique id corresponding to a DynamicServer instance DBSERVERNAME serverdb_shm # Name of default database server DBSERVERALIASES serverdb_tcp # List of alternate dbservernames NETTYPE ipcshm,2,100,CPU # Configure poll thread(s) for nettype NETTYPE soctcp,1,20,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 0 # 0 for single-processor, 1 formulti-processor NUMCPUVPS 2 # Number of user (cpu) vps SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps toone NOAGE 1 # Process aging AFF_SPROC 0 # Affinity start processor AFF_NPROCS 0 # Affinity number of processors# Shared Memory Parameters LOCKS 200000 # Maximum number of locks BUFFERS 128000 # Maximum number of shared buffers NUMAIOVPS 4 # Number of IO vps PHYSBUFF 128 # Physical log buffer size (Kbytes) LOGBUFF 64 # Logical log buffer size (Kbytes)LOGSMAX 80 # Maximum number of logical log files CLEANERS 4 # Number of buffer cleaner processes SHMBASE 0x200000000 # Shared memory base address SHMVIRTSIZE 16384 # 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 64 # Number of LRU queues LRU_MAX_DIRTY 5 # LRU percent dirty begin cleaning limit LRU_MIN_DIRTY 2 # LRU percent dirty end cleaning limit LTXHWM 45 # Long transaction high water markpercentage LTXEHWM 50 # Long transaction high water mark (exclusive) TXTIMEOUT 0x12c # Transaction timeout (in sec) STACKSIZE 128 # 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 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 /usr/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 5 # DS lockwait timeout (seconds) CDR_QUEUEMEM 4096 # Maximum amount of memory for any CDR queue (Kbytes)# Backup/Restore variables BAR_ACT_LOG /tmp/bar_act.log BAR_MAX_BACKUP 0 BAR_RETRY 1 BAR_NB_XPORT_COUNT 10 BAR_XFER_BUF_SIZE 31# Informix Storage Manager variables@@NL@