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MQSeries.net Forum Index » General IBM MQ Support » Large cluster - AIX - accumulation of amqcrsta processes

Large cluster - AIX - accumulation of amqcrsta processes

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nvannoy

Posted: Fri Jan 09, 2004 1:29 pm Post subject: Large cluster - AIX - accumulation of amqcrsta processes

Newbie

Joined: 09 Jan 2004
Posts: 3

We have a cluster with 1000+ qmgrs all running on AIX (4.3.3 and 5.2) with MQ 5.3 and patched with CSD05. We have recently been having irregular and sporadic network disconnects between our main servers and our remote qmgrs. This causes our server hosting the cluster queues to have thousands of amqcrsta processes running which eventually runs the system out of memory. It seems like the old amqcrstas from the broken connection never exits so the amqcrsta processes accumulate. What can we do to prevent this?
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NV

mrlinux

Posted: Mon Jan 12, 2004 1:30 pm Post subject:

Grand Master

Joined: 14 Feb 2002
Posts: 1261
Location: Detroit,MI USA

Well you could look at the application and make sure that it issues a MQDISC, especially if it aborts for some reason.

You could also run a cleanup routine to kill off the old ones.

This will get a list of the process's
ps -ef | grep amqcrsta

This will give you a list of active channels
the JOBNAME attribute contains the PID(either first/last half of jobname)
there is CHSTADA(2004-01-12) and CHSTATI(09.57.05) for date/time info
you could script the killing of these process's with the information provided
echo dis chs(CHANNEL_NAME) all
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Jeff

IBM Certified Developer MQSeries
IBM Certified Specialist MQSeries
IBM Certified Solutions Expert MQSeries

leongor

Posted: Mon Jan 19, 2004 10:01 am Post subject:

Master

Joined: 13 May 2002
Posts: 264
Location: Israel

BTW, IBM recommendation starting from v5.3 use runmqlsr(threaded) instead of amqcrsta(non threaded) listener.
There is a channel pool that handles a large number of channels.
_________________
Regards.
Leonid.

IBM Certified MQSeries Specialist.

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