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MQSeries.net Forum Index » General IBM MQ Support » How much 'stuff' in a queue

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anthony.barnes
PostPosted: Fri Jan 13, 2006 7:51 am    Post subject: How much 'stuff' in a queue Reply with quote

Apprentice

Joined: 01 Jul 2003
Posts: 26
Location: Oak Brook, Illinois

I'm not sure of the correct terminology but here goes…

How much ‘data’ can I put in a queue if...

If I define a local queue using WSMQ (Version 5.3 CSD11 for example) running on an OS of X (lets just pick AIX 5) how much data can I put in my local queue?

My Queue Manger has been configured with:
MAXMSGL of 104857600

My local queue has been defined with
MAXDEPTH of 640000
MAXMSGL of 104857600

What OS constraints do I hit? What MQ constraints do I hit? What is this limit even called?

Thanks a bunch for your time.
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zpat
PostPosted: Fri Jan 13, 2006 8:41 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK

You would find it difficult to store more data than your filesystem will hold
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anthony.barnes
PostPosted: Fri Jan 13, 2006 9:22 am    Post subject: Reply with quote

Apprentice

Joined: 01 Jul 2003
Posts: 26
Location: Oak Brook, Illinois

Quote:
You would find it difficult to store more data than your filesystem will hold


It that my limiting factor? Say I create 60 circular primary logs each 4Kb x 4095. Is that my "MAX" data?
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mvic
PostPosted: Fri Jan 13, 2006 9:35 am    Post subject: Reply with quote

Jedi

Joined: 09 Mar 2004
Posts: 2080

anthony.barnes wrote:
It that my limiting factor? Say I create 60 circular primary logs each 4Kb x 4095. Is that my "MAX" data?


I've heard of Q files greater than 4 Gb in size. I've also been aware of problems (can't remember details sorry) seen on >2 Gb queues early in MQ 5.3. Recent CSD - eg. 11 - should be fine.

The size of circular logs should not limit the depth of your queues.
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PeterPotkay
PostPosted: Fri Jan 13, 2006 9:41 am    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722

The theoritical limit on a queue is ~ 2 terrabytes, but of course your file system will fill up long before that.

I have put 25 GB of persistent messages on a single q with circular logging - Win2K MQ 5.3.0.11
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Peter Potkay
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PeterPotkay
PostPosted: Fri Jan 13, 2006 9:42 am    Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7722

Oh yeah, and on most (some? all?) unix systems, you have to enable the largefiles option to go above 2 GB.
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Peter Potkay
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