topic Re: System resource not available for creating threads in Operating System - HP-UX

System resource not available for creating threads

madhavabk — Tue, 07 Mar 2006 05:55:01 GMT

Hi All,

My NSPR dependent application is not able to create threads on HP 11i machine.

I have tried increasing max_threads_proc variable etc, but still i am getting same error.

Any inputs about new patches, or variable settings, or debugging tips.

Thanks,
Madhava

Re: System resource not available for creating threads

Steven E. Protter — Tue, 07 Mar 2006 06:51:03 GMT

Shalom,

check other parameters.

maxuprc
nproc
nfile

The first may have to do with too many processes for one user.

Is this a 32 or 64 bit app?

SEP

Re: System resource not available for creating threads

madhavabk — Tue, 07 Mar 2006 06:53:15 GMT

Hi,

It is a 64 bit application,.

Thanks,
Madhava

Re: System resource not available for creating threads

Victor BERRIDGE — Tue, 07 Mar 2006 08:49:25 GMT

Hi,
What message are you getting, it could be many things as SEP has already mentionned, or need some patches, you say you increased max_threads_proc, but what about the system large nkthread, the max number of kernel threads supported by the system?

All the best
Victor

Re: System resource not available for creating threads

madhavabk — Tue, 07 Mar 2006 22:26:25 GMT

Hi Victor,

The error message that i am getting is like this,

[07/Mar/2006:12:46:49 +051800] - ERROR<20492> - Backend Database - conn=-1 op=-1 msgId=-1 - Failed to create 5 threads(NSPR error -5974)

I hope this message is specific to my application. But NSPR is failing to create 5 threads which comes from NSPR.

I have increased nkthread and max_thread_proc and callout variable to 11000.

Thanks,
Madhava

Re: System resource not available for creating threads

Victor BERRIDGE — Wed, 08 Mar 2006 05:25:55 GMT

Hi again,

I cant imagine the system not logging in syslog.log if you were to have system trouble...
So I would never give to max_threads_proc a value greater than 1500 without a very good reason (a proved issue for example), I have some boxes with it set to about 2000 but I know why...
nkthread is seen as a way to limit some badly written code to hack all your resources so it should be tuned consequently and the default is (nproc*2)+16, on a box with max_threads_proc set to about 1500 I would see nkthread about 7800-8000
and the same box should have nfile to about 10000-20000, nproc I imagine around 2500-3000 etc...
Having said that your error message does not say its the system (to me) so it could be many things Ive seen java applications abort with almost the same messages because directories werent present or wrong permissions...
With the information you give us we cant say much (the system? ram? swap? what is running? how many users etc...)

All the best
Victor

Re: System resource not available for creating threads

Victor BERRIDGE — Wed, 08 Mar 2006 08:00:18 GMT

Thinking of it,
If you believe it were to do with some of these parameters, you could always monitor them, do a man of kcalarm kcmond kcusage

All the best
Victor