topic Re: Semop in Operating System - HP-UX

Semop

ziad_1 — Sat, 22 Feb 2003 06:57:08 GMT

when i try to run my tuxedo application i get the following error:
ERROR: System Lock semop failure key = 200003
errno=

and:
no space left in device

Any help?

Re: Semop

T G Manikandan — Sat, 22 Feb 2003 07:28:45 GMT

What is the errno value.

This relates to the OS errno which can guide further in resolving the problem.

Make sure that you look at the kernel parameters as required for the application.

ALso make sure that you have enough space on the file systems.

Revert with more information.Attach the error log file.

Thanks

Re: Semop

ziad_1 — Sat, 22 Feb 2003 09:58:11 GMT

Re: Semop

T G Manikandan — Sat, 22 Feb 2003 10:41:24 GMT

you are crossing the semaphore values in the kernel.

most probably you can receiving this error because the undo operations
requested by processes is exceeding the kernel limits.

you need to increase the value of semmnu.

you need to increase them on the kernel.
you can use
sam--->kernel configuration--->

increase the value of semmnu
then rebuild the kernel and a reboot.

check the man pages of semop.

Thanks

Re: Semop

T G Manikandan — Sat, 22 Feb 2003 10:42:55 GMT

Also check this kernel parameter page

http://docs.hp.com/hpux/onlinedocs/939/KCParms/KCparam.SemMNU.html

The default value is 30.Try increasing to 100.

revert after the results

Thanks

Re: Semop

Steven E. Protter — Sun, 23 Feb 2003 02:08:14 GMT

Some applicatoins allow you to set a semaphore key to make the memory use easier to identify when you run an ipcs command on the os.

Its a good idea to make sure your keys don't conflict just to keep things straight in your head. The key isn't important it was probably set by the tuxedo admin.

Lots of applicatoins are using semaphores and memory keys, and you'll want to make sure you have adequate space for all your apps. Even apache uses shared memory resources.

I've attached a resource analysis script that lets you collect data over any time period you designate. The script is production and it runs background.

SEP

Re: Semop

ziad_1 — Mon, 24 Feb 2003 07:58:30 GMT

thank you all ;the solution was to increase the semmnu parameter in the kernel .