IDS/BaaN performance issues

Greetings, We are running IDS version 7.30.uc5 on a 4-way HP 9000 K-250 with 2.25 GB of memory, and HP-UX 10.20. We are also a BaaN installation running b40c4 with about 20 production users, and 25 test users. We have been experiencing performance difficulties with BaaN, and I have modified our onconfig to try to adjust for this. I recently added memory to bring it up to 2.25 GB, and also adjusted the SHMVIRTSIZE,BUFFERS,and CLEANERS to try and make better use of the added memory. What I saw however in onstat -p was a decline in both read cache % and write cache %. Are buffers still an issue here? Also, where I do an onstat -g glo, it seems as if the virtual processors are not balancing the loads between them, as one processor seems to be doing 2X the work of the other two. I am able to confirm this by running glance- as the oninit processes are using only 20 -40% of the CPU, while the rest sit idle. Informix technical support says this is normal, but that just doesn't seem right. Thanks for any help you can give. Here is the info: onstat -p : Informix Dynamic Server Version 7.30.UC5 -- On-Line -- Up 14:20:53 -- 421160 K bytes Profile dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached 7536503 12194535 78503378 90.40 111959 163941 661937 83.09 isamtot open start read write rewrite delete commit rollbk 36612289 443031 1916363 29251116 68550 113615 19749 51768 0 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 6499.98 1867.23 69 344 bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans 526588 0 30721288 0 0 15 8138 13609 ixda-RA idx-RA da-RA RA-pgsused lchwaits 4436892 11 1311 4423770 3720 onstat -g glo Informix Dynamic Server Version 7.30.UC5 -- On-Line -- Up 14:22:21 -- 421160 K bytes MT global info: sessions threads vps lngspins 62 95 10 0 sched calls thread switches yield 0 yield n yield forever total: 30482118 28283418 2493985 135177 13918422 per sec: 0 0 0 0 0 Virtual processor summary: class vps usercpu syscpu total cpu 3 6612.03 1857.59 8469.62 aio 3 2.15 7.43 9.58 lio 1 0.76 2.22 2.98 pio 1 0.71 2.48 3.19 adm 1 4.06 9.73 13.79 msc 1 1.58 0.50 2.08 total 10 6621.29 1879.95 8501.24 Individual virtual processors: vp pid class usercpu syscpu total 1 2511 cpu 1023.73 410.28 1434.01 2 2512 adm 4.06 9.73 13.79 3 2513 cpu 3803.59 1070.54 4874.13 4 2514 cpu 1784.71 376.77 2161.48 5 2515 lio 0.76 2.22 2.98 6 2516 pio 0.71 2.48 3.19 7 2517 aio 0.79 2.68 3.47 8 2518 msc 1.58 0.50 2.08 9 2519 aio 0.69 2.57 3.26 10 2520 aio 0.67 2.18 2.85 tot 6621.29 1879.95 8501.24 onconfig file # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace nameROOTPATH /dev/informix/baan/rootdbs # 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 mirroredroot MIRROROFFSET 0 # Offset into mirrored device (Kbytes) # Physical Log Configuration PHYSDBS rootdbs # Location (dbspace) of physical log PHYSFILE 200000 # Physical log file size (Kbytes) # Logical Log Configuration LOGFILES 30 # Number of logical log files LOGSIZE 1000 # Logical log size (Kbytes) # Diagnostics MSGPATH /informix/logs/online_prod.log # System message log file path CONSOLE /informix/logs/console_prod.log # System console message path ALARMPROGRAM /informix/etc/no_log.sh # Alarm program path #ALARMPROGRAM /informix/etc/log_full.sh # Alarm program path # System Archive Tape Device TAPEDEV /dev/rmt/3m # Tape device path TAPEBLK 2048 # Tape block size (Kbytes) TAPESIZE 20000000 # Maximum amount of data to put on tape (Kbytes) # Log Archive Tape Device LTAPEDEV /dev/rmt/1m # Log tape device path#LTAPEDEV /dev/null # Log tape device path LTAPEBLK 2048 # Log tape block size (Kbytes) LTAPESIZE 4000000 # Max amount of data to put on log tape (Kbytes) # Optical STAGEBLOB # INFORMIX-OnLine/Optical staging area # System Configuration SERVERNUM 1 # Unique id corresponding to a OnLineinstance DBSERVERNAME baan # Name of default database server DBSERVERALIASES # List of alternate dbservernames 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 3 # 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 150000 # Maximum number of locks BUFFERS 100000 # Maximum number of shared buffers NUMAIOVPS 3 # 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 12 # Number of buffer cleaner processes SHMBASE 0x0 # Shared memory base address SHMVIRTSIZE 200000 # initial virtual shared memory segmentsize 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 16 # Number of LRU queues (increased from 8) LRU_MAX_DIRTY 2