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MQSeries.net Forum Index » IBM MQ Installation/Configuration Support » Maximum Uncommitted Messages

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duder
PostPosted: Tue Nov 19, 2002 10:26 am    Post subject: Maximum Uncommitted Messages Reply with quote

Newbie

Joined: 18 Nov 2002
Posts: 7

I ran into a problem where I received an exception while putting messages on the queue. I believe the problem lies in my setting of maximum uncommitted messages. When I set the value to 1000, I can only put 1000 messages in a single transaction. However, when I increase the value to 10000, I can only put 4000 messages in a single transaction. Also, the number of messages I can put seems to be related to the message size. Is this a valid assumption? Is there a maximum transaction size or a setting I can modify?

Thanks!
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mqonnet
PostPosted: Tue Nov 19, 2002 10:42 am    Post subject: Reply with quote

Grand Master

Joined: 18 Feb 2002
Posts: 1114
Location: Boston, Ma, Usa.

What platform???
What version of MQ and OS???

On some platforms there is a system wide limit on the number of messages in a UOW. You need to reconfigure it system wide. Even then, there is a limit to number of messages in one UOW. YOu cannot have say, 500,000 messages in a single UOW. From many aspects than one. And most importantly, performance wise.
As for size, i am not 100% sure. But there is some limit to that too. And it again is configurable.

Refer to systems admin guide.

Cheers
Kumar
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duder
PostPosted: Tue Nov 19, 2002 12:58 pm    Post subject: Reply with quote

Newbie

Joined: 18 Nov 2002
Posts: 7

I'm working with MQSeries 5.2 on Windows NT. Can anyone point me to the parameters I need to configure?

Thanks!
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nimconsult
PostPosted: Tue Nov 19, 2002 11:09 pm    Post subject: Reply with quote

Master

Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium

If you work with circular logging (which is the default), you are also limited by the total size of your log files. The default is 3+2 log files of 1Mb. This is 5 Mb. If you put 1k messages, you will generally fail after about 4000 messages, which seems to be your case.
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NIMCONSULT Software Architecture Services (Belgium)
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duder
PostPosted: Thu Nov 21, 2002 11:33 am    Post subject: Reply with quote

Newbie

Joined: 18 Nov 2002
Posts: 7

I modified my log settings and this resolved my problem.

Thanks for the info!
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