Off and On Informix Performance Issues

We have experienced Informix Performance issues where for no reason that we can determine, the Informix database slows down. We have run a Sniffer product to determine that they are no network issues. In fact all other applications are working fine in terms of response time. The server Performance monitor shows that the server does not seem to have any bottlenecks and the Informix database is the only application on this server. The best part is that after a couple of days of hair pulling, the performance issue disappears only to reappear in the following months. At this point in time, we are looking at our connection client which I am told is Inet. Does anyone have any knowledge of how to improve Inet? Due to the economy, our best Informix person is no longer with the company and I have had no formal training so I am sorry if my message is a little incoherent.

Gary Aders wrote: > We have experienced Informix Performance issues where for no reason > that we can determine, the Informix database slows down. We have run > a Sniffer product to determine that they are no network issues. In > fact all other applications are working fine in terms of response > time. The server Performance monitor shows that the server does not > seem to have any bottlenecks and the Informix database is the only > application on this server. The best part is that after a couple of > days of hair pulling, the performance issue disappears only to > reappear in the following months. At this point in time, we are > looking at our connection client which I am told is Inet. Does anyone > have any knowledge of how to improve Inet? Due to the economy, our > best Informix person is no longer with the company and I have had no > formal training so I am sorry if my message is a little incoherent. When you next experience these problems, run the following commands: onstat -p onstat -F onstat -R onstat -m onstat -g seg and post the output. Some information on the machine (# CPUS, RAM, disk, make, OS) would be useful at the same time. Is there possibly a batch process running when this happens? Like a monthly / quarterly purge or something?

gaders@masterbrandcabinets.com (Gary Aders) wrote in message news:<4a5a9f2f.0306100611.83d1fcf@posting.google.com>... > We have experienced Informix Performance issues where for no reason > that we can determine, the Informix database slows down. We have run > a Sniffer product to determine that they are no network issues. In > fact all other applications are working fine in terms of response > time. The server Performance monitor shows that the server does not > seem to have any bottlenecks and the Informix database is the only > application on this server. The best part is that after a couple of > days of hair pulling, the performance issue disappears only to > reappear in the following months. At this point in time, we are > looking at our connection client which I am told is Inet. Does anyone > have any knowledge of how to improve Inet? Due to the economy, our > best Informix person is no longer with the company and I have had no > formal training so I am sorry if my message is a little incoherent. Here is the online config file #************************************************************************** # # INFORMIX SOFTWARE, INC. # # Title: onconfig.std # Description: INFORMIX-OnLine Configuration Parameters # #************************************************************************** # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace name ROOTPATH E:\\IFMXDATA\\ol_p05s02\\rootdbs_dat.000 # Path for device containing root dbspace # Path for device containing root dbspace ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes) ROOTSIZE 250000 # 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 PHYSBUFF 64 # Physical log buffer size (Kbytes)PHYSDBS rootdbs # Location (dbspace) of physical log PHYSFILE 11000 # Physical log file size (Kbytes)# Logical Log Configuration LOGBUFF 64 # Logical log buffer size (Kbytes)LOGSMAX 300 # Maximum number of logical log files LOGFILES 225 # Number of logical log files LOGSIZE 500 # Logical log size (Kbytes)# Diagnostics MSGPATH E:\\WIN32APP\\INFORMIX\\online.log # System message log file path CONSOLE E:\\WIN32APP\\INFORMIX\\console.log # System console message path ALARMPROGRAM E:\\WIN32APP\\INFORMIX\\etc\\log_full.bat # Alarm program path # System Archive Tape Device #TAPEDEV E:\\TAPEFILE # Tape device path TAPEDEV \\\\.\\TAPE0 # Tape device path#TAPEDEV NUL # Tape device path TAPEBLK 16 # Tape block size (Kbytes) TAPESIZE 3200000 # Maximum amount of data to put on tape (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) # OpticalSTAGEBLOB # INFORMIX-OnLine/Optical staging area # System Configuration SERVERNUM 0 # Unique id corresponding to a OnLineinstance DBSERVERNAME ol_p05s02 # Name of default Dynamic Server DBSERVERALIASES # List of alternate dbservernames NETTYPE soctcp,1,,NET # Override sqlhosts nettype parameters DEADLOCK_TIMEOUT 60 # Max time to wait of lock indistributed env. RESIDENT 0 # Forced residency flag (Yes = 1, No = 0) MULTIPROCESSOR 0 # 0 for single-processor, 1 formulti-processor NUMCPUVPS 1 # Number of user (cpu) vps SINGLE_CPU_VP 1 # If non-zero, limit number of cpu vpsto one NOAGE 0 # Process aging AFF_SPROC 0 # Affinity start processor AFF_NPROCS 0 # Affinity number of processors# Shared Memory Parameters LOCKS 250000 # Maximum number of locks BUFFERS 1000 # Maximum number of shared buffers NUMAIOVPS 1 # Number of IO vps CLEANERS 2 # Number of buffer cleaner processes SHMBASE 0xc000000 # Shared memory base address SHMVIRTSIZE 51200 # initial virtual shared memorysegment size 50MB SHMADD 10240 # Size of new shared memory segments (Kbytes) 10MB SHMTOTAL 0 # Total shared memory (Kbytes). 0=>unlimited 180MB CKPTINTVL 180 # Check point interval (in sec) LRUS 8 # Number of LRU queues LRU_MAX_DIRTY 50 # LRU percent dirty begin cleaninglimit LRU_MIN_DIRTY 40 # 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 164 # Stack size (Kbytes)# System Page Size # BUFFSIZE - OnLine no longer supports this configuration parameter. # To determine the page size used by OnLine 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 \\tmp # DR lost+found file path# Backup/Restore variables BAR_ACT_LOG bar_act.log #Path of log file for onbar.exe BAR_MAX_BACKUP 0 BAR_RETRY 1 BAR_NB_XPORT_COUNT 10 BAR_XFER_BUF_SIZE 31# Read Ahead Variables RA_PAGES 8 # Number of pages to attempt to readahead RA_THRESHOLD 4 # Number of pages left before nextgroup # DBSPACETEMP: # OnLine equivalent of DBTEMP for SE. This is the list of dbspaces # that the OnLine SQL Engine will use to create temp tables etc. # If specified it must be a colon separated list of dbspaces that exist # when the OnLine 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 ol_t

Further information on Gary's posting: We are using Informix Dynamic Server 7.31.TD6 on Windows 2000 Server and Informix Dynamic Server 7.30.TC9 on Windows NT. We're having slow performance problems on both platforms. We use Informix Setnet 32 for connection with protocolname olsoctcp and the turbo service. I can provide onconfig files and further information on request. Please be specific on the requested information.