Informix IDS 9.4 failed to initialized shared memory

I just installed Informix IDS 9.4 on Mandrake 10.1 Kernel 2.6.x I setup the onconfig file. the following are some of the parameters I set: # Root Dbspace Configuration ROOTNAME rootdbs1 # Root dbspace nameROOTPATH /home/informix/dbspaces/rootdbs1 # Path for device containing root dbspace SERVERNUM 1 # Unique id corresponding to a OnLineinstance DBSERVERNAME olmids1 # Name of default database server # Shared Memory Parameters LOCKS 2000 # Maximum number of locks BUFFERS 1000 # Maximum number of shared buffers NUMAIOVPS # Number of IO vps PHYSBUFF 32 # Physical log buffer size (Kbytes) LOGBUFF 32 # Logical log buffer size (Kbytes) CLEANERS 1 # Number of buffer cleaner processes SHMBASE 0x10000000L # Shared memory base address 44000000L SHMVIRTSIZE 8000 # initial virtual shared memory segmentsize SHMADD 8192 # Size of new shared memory segments (Kbytes) SHMTOTAL 128000 # Total shared memory (Kbytes). 0=>unlimited CKPTINTVL 300 # Check point interval (in sec) LRUS 8 # Number of LRU queues LRU_MAX_DIRTY 60.000000 # LRU percent dirty begin cleaning limit LRU_MIN_DIRTY 50.000000 # LRU percent dirty end cleaning limit TXTIMEOUT 0x12c # Transaction timeout (in sec) STACKSIZE 32 # Stack size (Kbytes) I used the onmonitor and tried to startup the instance but it failed with: failed to initialized shared memory. I checked the log file but there are no messages about the problem. I did not change/add/modify the parameters in the kernel ( I am new in Linux ;-)) And I think that is the problem. Does somebody know what parameters I need to set? what values will be good to use? What file do I need to modify? Permissions? etc. Regards, Gerardo. My machine has only 768 in RAM.

Chivi wrote: > I just installed Informix IDS 9.4 on Mandrake 10.1 Kernel 2.6.x > > I setup the onconfig file. the following are some of the parameters I > set: > # Root Dbspace Configuration > > ROOTNAME rootdbs1 # Root dbspace name> ROOTPATH /home/informix/dbspaces/rootdbs1 > # Path for device containing root dbspace > SERVERNUM 1 # Unique id corresponding to a OnLine> instance > DBSERVERNAME olmids1 # Name of default database server> > # Shared Memory Parameters > > LOCKS 2000 # Maximum number of locks > BUFFERS 1000 # Maximum number of shared buffers > NUMAIOVPS # Number of IO vps > PHYSBUFF 32 # Physical log buffer size (Kbytes) > LOGBUFF 32 # Logical log buffer size (Kbytes) > CLEANERS 1 # Number of buffer cleaner processes > SHMBASE 0x10000000L # Shared memory base address 44000000L > SHMVIRTSIZE 8000 # initial virtual shared memory segment> size > SHMADD 8192 # Size of new shared memory segments > (Kbytes) > SHMTOTAL 128000 # Total shared memory (Kbytes). > 0=>unlimited > CKPTINTVL 300 # Check point interval (in sec) > LRUS 8 # Number of LRU queues > LRU_MAX_DIRTY 60.000000 # LRU percent dirty begin cleaning limit > LRU_MIN_DIRTY 50.000000 # LRU percent dirty end cleaning limit > TXTIMEOUT 0x12c # Transaction timeout (in sec) > STACKSIZE 32 # Stack size (Kbytes)> > > I used the onmonitor and tried to startup the instance but it failed with: > failed to initialized shared memory. > I checked the log file but there are no messages about the problem. > > > I did not change/add/modify the parameters in the kernel ( I am new in > Linux ;-)) > And I think that is the problem. > Does somebody know what parameters I need to set? > what values will be good to use? > What file do I need to modify? > Permissions? etc. > > My machine has only 768 in RAM. I hope that's MB and not KB? 1000 buffers at 2K per buffer is 2MB - not very much on most machines. Your SHMBASE line documents two values - why did you change anyything? You limit your SHM to 128 MB (give or take) - I think you'd do better to use a bit more up front - 10,000 BUFFERS? Offhand, I don't recall having to modify the kernel to get shared memory to work - but reading the machine notes would be a good idea to make sure you know what they say; they might also clarify the value for SHMBASE. You don't have the memory randomization feature enabled, do you? The one that's in RedHat... -- Jonathan Leffler #include <disclaimer.h> Email: jleffler@earthlink.net, jleffler@us.ibm.com Guardian of DBD::Informix v2005.01 -- http://dbi.perl.org/