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| kumarbai |
 Posted: Wed Jun 11, 2014 4:11 am Post subject: MAXUMSGS value change |
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Apprentice
Joined: 24 May 2013
Posts: 45
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I am trying to put messages on the remote queue of my local queue Manager QM1.
The remote queue maps to the local queue of another remote queue manager QM2 residing on some other system.
My local Queue manager has the MAXUMSGS setting as 10000.When i am trying to send more than 10000 uncommitted messages i am getting MQ error 2024 at my end.
Can i increase the value of MAXUMSGS to more than 10000 safely at my local Queue manager .Does the the remote queue manager also needs any changes. |
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| exerk |
| Posted: Wed Jun 11, 2014 4:15 am Post subject: Re: MAXUMSGS value change |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| kumarbai wrote: |
| My local Queue manager has the MAXUMSGS setting as 10000.When i am trying to send more than 10000 uncommitted messages i am getting MQ error 2024 at my end. |
Were you expecting something else?
| kumarbai wrote: |
| Can i increase the value of MAXUMSGS to more than 10000 safely at my local Queue manager. |
That's a question only you can answer - you know the spec and resource usage of your system, we don't.
| kumarbai wrote: |
| Does the the remote queue manager also needs any changes. |
Why do you think it would?
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 4:25 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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hi ,
Thanks for the reply.
Sending more than 10000 messages happens once in a blue moon.So as per your reply it seems it is sufficient only to change the value at my qmanager end.
So no change required anywhere else? |
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| exerk |
| Posted: Wed Jun 11, 2014 4:29 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| kumarbai wrote: |
| Sending more than 10000 messages happens once in a blue moon |
That is irrelevant - what you should be questioning is why an application requires putting > 10,000 messages before committing? What's to stop them deciding to send 1,000,000+ messages before committing when the next blue moon arrives?
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It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 4:35 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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Sending more than 10000 messages happens once in a while onlyand also in rare cases.It may not exceed 50000 in that case also.
The application needs to send all these messages at one shot as it depends on other transactions. Either send all messages or don't send any at all.
So do you see any issue in changing the MAXUMSGS setting to a higher value at my Q manager end.?
The other end need not bother about my change.Right? |
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| fjb_saper |
| Posted: Wed Jun 11, 2014 4:42 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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| kumarbai wrote: |
Sending more than 10000 messages happens once in a while onlyand also in rare cases.It may not exceed 50000 in that case also.
The application needs to send all these messages at one shot as it depends on other transactions. Either send all messages or don't send any at all.
So do you see any issue in changing the MAXUMSGS setting to a higher value at my Q manager end.?
The other end need not bother about my change.Right? |
Just changing the max uncommitted messages won't do it alone. You also need to verify that you have enough log space (defined and available) to accommodate that max uncommitted message number.
Have fun 
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MQ & Broker admin |
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| kumarbai |
| Posted: Wed Jun 11, 2014 4:45 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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| Quote: |
Just changing the max uncommitted messages won't do it alone. You also need to verify that you have enough log space to accommodate that max uncommitted message number.
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You mean the enough disk space?
Last edited by kumarbai on Wed Jun 11, 2014 4:47 am; edited 1 time in total |
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| exerk |
| Posted: Wed Jun 11, 2014 4:46 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| kumarbai wrote: |
| Sending more than 10000 messages happens once in a while only and also in rare cases. It may not exceed 50000 in that case also. |
Make sure that's documented so you can use it as evidence when they try sending more than that and you hit MQRC 2024 again, you'll be able to use it as ammunition during the 'why didn't you send our messages' Q & A session.
| kumarbai wrote: |
| The application needs to send all these messages at one shot as it depends on other transactions. Either send all messages or don't send any at all. |
Sounds like a poor design to me.
| kumarbai wrote: |
| So do you see any issue in changing the MAXUMSGS setting to a higher value at my Q manager end.? |
Again, I don't know your system spec or usage and I'm just some random stranger on the internet, but you could work out whether they'll fit in the available memory/buffer/storage.
| kumarbai wrote: |
| The other end need not bother about my change.Right? |
Think more deeply about your question, to which you already know the answer.
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 4:50 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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| Quote: |
| The other end need not bother about my change.Right? |
| Quote: |
| Think more deeply about your question, to which you already know the answer. |
My answer is no need of any change at the other end except at my local q manager .No changes required at the channels or at remote queue manager.
Hope you don't contradict. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 5:09 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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| Does after the change of MAXUMSGS setting requires restart of the Q manager? |
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| exerk |
| Posted: Wed Jun 11, 2014 5:10 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| kumarbai wrote: |
| Does after the change of MAXUMSGS setting requires restart of the Q manager? |
What does the Knowledge Centre (assuming you can get into it) say?
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 5:17 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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| exerk wrote: |
| kumarbai wrote: |
| Does after the change of MAXUMSGS setting requires restart of the Q manager? |
What does the Knowledge Centre (assuming you can get into it) say? |
I am not able to get into it.and no where else is it is specifically mentioned.
can you guide pls? |
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| exerk |
| Posted: Wed Jun 11, 2014 5:21 am Post subject: |
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Jedi Council
Joined: 02 Nov 2006
Posts: 6339
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| kumarbai wrote: |
| exerk wrote: |
| kumarbai wrote: |
| Does after the change of MAXUMSGS setting requires restart of the Q manager? |
What does the Knowledge Centre (assuming you can get into it) say? |
I am not able to get into it.and no where else is it is specifically mentioned.
can you guide pls? |
Test it! Find, or create, a queue manager where you can reduce MQXUMSGS to something very small and see if it takes immediate effect. Then, change it back to a higher figure and see it has immediate effect. Simples!
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
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| kumarbai |
| Posted: Wed Jun 11, 2014 5:27 am Post subject: |
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Apprentice
Joined: 24 May 2013
Posts: 45
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| exerk wrote: |
| kumarbai wrote: |
| exerk wrote: |
| kumarbai wrote: |
| Does after the change of MAXUMSGS setting requires restart of the Q manager? |
What does the Knowledge Centre (assuming you can get into it) say? |
I am not able to get into it.and no where else is it is specifically mentioned.
can you guide pls? |
Test it! Find, or create, a queue manager where you can reduce MQXUMSGS to something very small and see if it takes immediate effect. Then, change it back to a higher figure and see it has immediate effect. Simples! |
Yes it will effect only after queue manager has restarted . |
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| zpat |
| Posted: Wed Jun 11, 2014 6:29 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5849
Location: UK
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Just commit (syncpoint) your messages more often.
Generally around 100 to 200 messages in a unit of work is about right.
Then you don't have any limit on the number overall.
If you are hitting this 10,000 limit - it's because your application is not designed properly.
_________________
Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error. |
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