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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Shared memory/semaphores

Shared memory/semaphores

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mqmike

Posted: Thu Nov 11, 2004 4:05 am Post subject: Shared memory/semaphores

Acolyte

Joined: 09 Jul 2004
Posts: 63

I'm wanting to upgrade an AIX box from MQv5.2 to MQv5.3 with CSD05. I've read a section in the CSD readme that instructs you to remove any shared memory or semaphores before applying maintenance.

Two questions:

1) Shall I do this by using ipcs | grep mqm to check for semaphores.
Then remove them using ipcrm -s 'pid'.

2) Do I need to do the same process when upgrading to MQv5.3 or only before I apply the CSD?

Thanks in advance

KeeferG

Posted: Thu Nov 11, 2004 5:05 am Post subject:

Master

Joined: 15 Oct 2004
Posts: 215
Location: Basingstoke, UK

I think this means you should run "/opt/mqm/bin/amqiclen -x" as a root user.

amqiclen is a utility to clear up any semaphores etc

Take a look at http://www.mqseries.net/phpBB2/viewtopic.php?t=264&highlight=amqiclen for more information on the utility. You should only need to run it once.
_________________
Keith Guttridge
-----------------
Using MQ since 1995

Tibor

Posted: Thu Nov 11, 2004 6:18 am Post subject:

Grand Master

Joined: 20 May 2001
Posts: 1033
Location: Hungary

KeeferG wrote:

I think this means you should run "/opt/mqm/bin/amqiclen -x" as a root user.

...or even as mqm user.

vennela

Posted: Thu Nov 11, 2004 7:14 am Post subject:

Jedi Knight

Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India

If you want to do a hard ipcrm here is a sample script.

http://www.mqseries.net/phpBB2/viewtopic.php?t=5031&highlight=ipcrm

Tibor

Posted: Fri Nov 12, 2004 1:43 am Post subject:

Grand Master

Joined: 20 May 2001
Posts: 1033
Location: Hungary

vennela wrote:

If you want to do a hard ipcrm here is a sample script.

Vennela,

This script can crash your qmgrs when you use more on a box. Contrastly, amqiclen utility will be work in a multiple qmgr environment without any side-effect.

Tibor

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