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MQSeries.net Forum Index » General IBM MQ Support » MQGET hangs in LOOP with syncpoint

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Vitor
PostPosted: Tue Oct 25, 2011 11:25 am    Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
lyntongrice wrote:
When I say 12 messages per second I mean processing the message as well (user exits etc) and sending into the target system.....but I hear you, it could be quicker


I guessed.

As a comparison, all applications on this site have an "infrastructure" SLA of 50 messages a second. Below that, they're not allowed to move to production. There are a dozen or so that have a business SLA of 100 messages a second which are configured to run at 150 mps (some of the business owners have large, sharp sticks & no patience).

I've met systems in large brokerages & banks with expected mps much, much higher. These of course are either running on Unix boxes with "Love" tattooed on one CPU & "Hate" tattooed on the other or on z/OS.

It's all relative. But even a default configured queue manager on Solaris should be doing better than that. So I wonder about your reference to "user exits" - are these loaded into the queue manager? Because a badly written exit will really slow down a queue manager. A really badly written one will crash it. Somewhere in the middle could cause things to hang inexplicably, hence my mentioning it.

I don't see what you'd need an exit for in this simple scenario you've described.
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