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| WBI Persistence and nonpersistence Msg Response |
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| abs_cal |
 Posted: Tue Aug 23, 2005 6:02 am Post subject: WBI Persistence and nonpersistence Msg Response |
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Acolyte
Joined: 18 Aug 2005
Posts: 62
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| Anybody can explain me why nonpersistence msg is having better response time than persistence in broker. Would be great if you explain a bit more. Is it viceversa in Java? |
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| jefflowrey |
| Posted: Tue Aug 23, 2005 6:06 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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It's got nothing to do with broker or Java.
MQ does more work with persistant messages than it does with non-persistant messages, to ensure that they *are* persistant.
Persistant messages will always be slower than non-persistant messages.
_________________
I am *not* the model of the modern major general. |
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| zpat |
| Posted: Tue Aug 23, 2005 6:45 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Persistent messages cause disk i/o, slower - but surer if the queue manager restarts (as they are recovered from disk).
Use non-persistent where the recovery is by the application (for example a request message is re-issued if no response is received) but make the messages have expiry values.
Use persistent where the application relies on the assured delivery (and these usually have no expiry). |
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| hopsala |
| Posted: Tue Aug 23, 2005 10:02 am Post subject: |
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Guardian
Joined: 24 Sep 2004
Posts: 960
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If memory serves, you can determine the trasaction level for broker processing (You can implement it in your code, and there's a parameter for flow that you can set to do this automatically) - so that if entering msg is non-persistent, broker works much like mq with very low recovery level, and if message is persistent works with recovarable transactions. The broker works much faster when in unrecovarable mode.
I don't remember where that parm is, but i'm sure you can dig it up. |
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