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| kvranjan |
 Posted: Thu Dec 07, 2006 4:38 am Post subject: increasing maxmsglength,need quick answer. |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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Hi all,
what impact can i expect if i increase the maxmsg length attribute on mesages.I mean i would like to know how it would effect the environment performancewise.I am not aware wat would be the performance wise issues.
Need a quick reply.
awaiting ur reply. |
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| wschutz |
| Posted: Thu Dec 07, 2006 4:39 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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The MaxMsgLength is an attribute of a queue, not of a message .....
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-wayne |
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| kvranjan |
| Posted: Thu Dec 07, 2006 4:51 am Post subject: |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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ya sorry for that,
wat kind of impact would be there setting this on the queues,qmgrs,and channels all together to the max say 100 mb. |
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| wschutz |
| Posted: Thu Dec 07, 2006 4:54 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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SETTING the value has NO impact, at all ....
however, it does ALLOW larger messages, which does have an impact. See the performance reports for a qualitative answer
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| kvranjan |
| Posted: Thu Dec 07, 2006 5:01 am Post subject: |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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hi,
can you specify the xact link, where i can get a better look.
thanx for ur prompt reply. |
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| wschutz |
| Posted: Thu Dec 07, 2006 5:03 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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| jefflowrey |
| Posted: Thu Dec 07, 2006 5:16 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Consider, as well, the following situation.
You change all the necessary MaxMsgLn properties on all objects for a communication between two queue managers.
Then an application sends a bunch of larger messages.
But the queue manager log file settings were designed only for the previous MaxMsgLn.
So the messages can't flow over the channel, because the logs fill up.
That's an impact.
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| wschutz |
| Posted: Thu Dec 07, 2006 5:21 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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also true of the filesystem holding the queue data files, eh?
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| kvranjan |
| Posted: Thu Dec 07, 2006 5:25 am Post subject: |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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hi ,
Does this increase any processing time or as such.
Thanx for ur valueble input. |
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| jefflowrey |
| Posted: Thu Dec 07, 2006 5:32 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Yes, bigger messages increases processing time.
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| kvranjan |
| Posted: Thu Dec 07, 2006 5:41 am Post subject: |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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hi ,
thanx for that, any other performance wise effects. |
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| jefflowrey |
| Posted: Thu Dec 07, 2006 5:43 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Read the performance support pack!
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| kvranjan |
| Posted: Thu Dec 07, 2006 5:50 am Post subject: |
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Apprentice
Joined: 12 Jul 2006
Posts: 28
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| Ya i have just gone through that.And it says about performance tuning parameters like RAM upto 1Mb,but it also says to be cautious.So what could be a suggestable value.on RAM and the MAXMSGL attributes. |
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| jefflowrey |
| Posted: Thu Dec 07, 2006 5:53 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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The suggested values are "The ones that meet your requirements".
If you would like someone to help you identify your requirements, and then someone to help you match those requirements to the environment, and then tune the queue manager to meet those requirements, then you should hire a consultant.
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