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| Bartez75 |
 Posted: Wed Jun 10, 2009 1:54 am Post subject: MQ Output node and Open output count properties of the queue |
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Voyager
Joined: 26 Oct 2006
Posts: 80
Location: Poland, Wroclaw
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Hi
I have a question regarding Open output count properties of the queue that is used in MQOutput node by the broker 6.0 flow.
In my flow when broker put the message (with destination list) the queue has Open output count = 1 for some seconds.
After some time it is released and changed to value 0.
I guess this is normal, yes?
I'm wondering if it is possible that broker will release the queue (Open output count will be 0) just after it puts the message on it?
If it is possible please point me to right direction of my searching.
Is it something to do with Transaction mode that is set on MQOutput node (Yes, No, Automatic)? |
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| Vitor |
| Posted: Wed Jun 10, 2009 1:59 am Post subject: Re: MQ Output node and Open output count properties of the q |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Bartez75 wrote: |
| I guess this is normal, yes? |
| Bartez75 wrote: |
| Is it something to do with Transaction mode that is set on MQOutput node (Yes, No, Automatic)? |
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| zpat |
| Posted: Wed Jun 10, 2009 2:02 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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It is presumably for performance reasons, to avoid re-opening the queue too frequently as this has an overhead.
Input queues are kept open because the message flow has a MQGET WAIT outstanding on the queue. |
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| Vitor |
| Posted: Wed Jun 10, 2009 2:14 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| zpat wrote: |
| It is presumably for performance reasons, to avoid re-opening the queue too frequently as this has an overhead. |
Imagine that the MQOutput node is doing a PUT1 call under the covers and you've got the idea.
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| zpat |
| Posted: Wed Jun 10, 2009 2:20 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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| Not quite, since that would close the queue immediately after the MQPUT. |
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| Vitor |
| Posted: Wed Jun 10, 2009 2:25 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| zpat wrote: |
| Not quite, since that would close the queue immediately after the MQPUT. |
Hence my use of the words "Imagine" and "the idea" - I was using an analogy rather than claiming there really was a PUT1 in there somewhere.
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