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MQSeries.net Forum Index » General IBM MQ Support » MQseries error message : cannot fork: too many processes

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steiner
PostPosted: Tue Mar 22, 2005 6:04 am    Post subject: MQseries error message : cannot fork: too many processes Reply with quote

Voyager

Joined: 07 Mar 2003
Posts: 89

Hello,

Since a few time , we have an error message like as :
cannot fork: too many processes
when connecting with user mqm.

On this HP-UX Server we have installed MQSeries 5.3.05 and 5 qmgrs.
Is there a max number of process count for this mqm user or is there a configuration problem (qm.ini) on anyone of the qmgrs.

On the other side is there perhaps a kernel parameter to modify to solve this problem.

Can you help us on this problem.

Thanks.
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malammik
PostPosted: Tue Mar 22, 2005 6:12 am    Post subject: Reply with quote

Partisan

Joined: 27 Jan 2005
Posts: 397
Location: Philadelphia, PA

variables nproc (max. number of processes), maxusers (mas. numberof users)
and the max. number of processes by user duplicating it.

out of the box nproc is 256 and that's most likely where your problem is.
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csmith28
PostPosted: Tue Mar 22, 2005 8:05 am    Post subject: Reply with quote

Grand Master

Joined: 15 Jul 2003
Posts: 1196
Location: Arizona

unable to fork new process usually indicates that you are having a problem with the paging space on the server not MQSeries.
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steiner
PostPosted: Wed Mar 23, 2005 8:18 am    Post subject: Answer to cannot Fork.... Reply with quote

Voyager

Joined: 07 Mar 2003
Posts: 89

Hello ,

Thanks for your answer.
Just for a few minutes we have the same Problem. So we test all our parameters and the results are :
227 processes and 79 processes mqm

Our kernel configuration is :
nproc:16404
maxusers :2048

So we think there isn't a kernel Problem.

So perhaps have you an other idea.

Thanks.
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sebastianhirt
PostPosted: Wed Mar 23, 2005 8:34 am    Post subject: Reply with quote

Yatiri

Joined: 07 Jun 2004
Posts: 620
Location: Germany

Hi,

I am not really sure, but wouldn't you get the same if your user limits are not sufficient/to low? I know on AIX the comand to see them is ulimit -a. There must be something equal on HP-UX.

cheers

Sebastian
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