Major performance problems with Informix Online

Hi, We upgrade from Informix SE to Informix Online about a week ago and since then have been experiencing significant performance problems; significant enough to make the system virtually unusuable. Queries which previously took 2 or 3 seconds are escalating up to 1-2 minutes. Our support people have all drawn blanks and we are now even considering wiping the box and resorting back to the old version by restoring from tape (thus losing a weeks worth or work and data). We suspect the problem could be with the configuration of Online and would appreciate any assistance which is available. The configuration of the box is as follows: Siemens Nixdorf RM600 containing 8 RISC Processors 900MB RAM 80GB Disk Space Approximately 60-80 users. It's running a Patient Administration System Below is a copy of the online configurations (there are two on our box and i'm not sure which is being used.) onconfig.camis_l: #************************************************************************** # # INFORMIX SOFTWARE, INC. # # Title: onconfig.camis_l # Description: INFORMIX-OnLine Configuration Parameters # # Created on 7 March 1996 # #************************************************************************** # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace name ROOTPATH /home/local/dev/camis_l_onraw010s7 # Path for device containing root dbspace ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes) ROOTSIZE 20000 # 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 camis_phy01 # Location (dbspace) of physical log PHYSFILE 249894 # Physical log file size (Kbytes) # Logical Log Configuration LOGFILES 30 # Number of logical log files LOGSIZE 20000 # Logical log size (Kbytes) # Diagnostics MSGPATH /home/informix/grimpas_camis_online.log # System message log file path CONSOLE /dev/console # System console message path ALARMPROGRAM /opt/lib/informix/etc/log_full.sh # Alarm program path # System Archive Tape Device TAPEDEV /dev/null # Tape device path TAPEBLK 64 # Tape block size (Kbytes) TAPESIZE 4500000 # Maximum amount of data to put on tape (Kbytes) # Log Archive Tape Device LTAPEDEV naj # Log tape device path LTAPEBLK 64 # Log tape block size (Kbytes) LTAPESIZE 4500000 # Max amount of data to put on log tape (Kbytes) # Optical STAGEBLOB # INFORMIX-OnLine/Optical staging area # System Configuration SERVERNUM 50 # Unique id corresponding to a OnLineinstance DBSERVERNAME grimpascamis_l_shm # Name of default database server DBSERVERALIASES grimpascamis_l_tcp # List of alternate dbservernames NETTYPE ipcshm,1,200,CPU # Override sqlhosts nettypeparameters NETTYPE tlitcp,1,200,NET # Override sqlhosts nettypeparameters DEADLOCK_TIMEOUT 60 # Max time to wait of lock indistributed env. RESIDENT 1 # Forced residency flag (Yes = 1, No = 0) MULTIPROCESSOR 1 # 0 for single-processor, 1 formulti-processor NUMCPUVPS 6 # Number of user (cpu) vps SINGLE_CPU_VP 0 # 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 10000 # Maximum number of locks BUFFERS 20000 # Maximum number of shared buffers NUMAIOVPS 12 # Number of IO vps PHYSBUFF 32 # Physical log buffer size (Kbytes) LOGBUFF 32 # Logical log buffer size (Kbytes)LOGSMAX 100 # Maximum number of logical log files CLEANERS 9 # Number of buffer cleaner processes SHMBASE 0x20000000 # Shared memory base address SHMVIRTSIZE 16384 # initial virtual shared memorysegment size SHMADD 16384 # Size of new shared memory segments (Kbytes) SHMTOTAL 0 # Total shared memory (Kbytes). 0=>unlimited CKPTINTVL 300 # Check point interval (in sec) LRUS 4 # Number of LRU queues LRU_MAX_DIRTY 3 # LRU percent dirty begin cleaninglimit LRU_MIN_DIRTY 1 # 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 - 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 /home/informix/etc/dr.lostfound # DR lost+found filepath # Read Ahead Variables RA_PAGES # Number of pages to attempt to readahead RA_THRESHOLD # 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 camis_tmp01 # Default temp dbspaces # DUMP*: # The following parameters control the type of diagnostics information which # is preserved when an unanticipated error condition (assertion fai