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| senMQ |
 Posted: Mon Aug 25, 2008 7:35 am Post subject: ulimit |
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Acolyte
Joined: 14 Aug 2006
Posts: 66
Location: Palo Alto, CA
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Initially ulimit on one of servers with a couple of queue managers was set to 2G (default). We had to change this as we were constantly seeing queue file issue on some of our applications queues. So, our unix admin changed the ulimit to be unlimited. (enabled large file size & ulimit for MQ admin user id).
I believe that we have to recreate the MQ queues after ulimit change. We did that for the qpplication queues.
But my question here is how would I do this for system queues. I anticipate the same issue to occur on the system queues also, like on SYSTEM.CLUSTER.TRANSMIT.QUEUE as this is clustered MQ environment.
So, can go I just delete and define the system queue also or use strmqm -c option. If I do this I'll loose all the messages in the cluster repository queue also. So, I've to run a refresh cluster command.
What would be the right approach here?
Thnx |
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| fschofer |
| Posted: Mon Aug 25, 2008 8:12 am Post subject: |
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Knight
Joined: 02 Jul 2001
Posts: 524
Location: Mainz, Germany
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Hi,
why you think you have to recreate the queues ?
I remember a similar case some years ago and so far i can remember there was no need for recreation.
Greetings
Frank |
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| mqjeff |
| Posted: Mon Aug 25, 2008 8:18 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Changes to ulimit only take effect on AIX when files are created.
MQ only creates Q files when queues are created. |
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| fjb_saper |
| Posted: Mon Aug 25, 2008 10:50 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Don't understand though why he would need an XMITQ here SYSTEM.CLUSTER.TRANSMIT.QUEUE to be over 2 GB in size????
NO an XMITQ is not another form of DB. It is not set to be used to store messages....
Do you mean to say you have applications that post messages so fast they are way faster than the channel's io rates??
What are you trying to do??
Enjoy 
_________________
MQ & Broker admin |
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| senMQ |
| Posted: Mon Aug 25, 2008 2:58 pm Post subject: |
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Acolyte
Joined: 14 Aug 2006
Posts: 66
Location: Palo Alto, CA
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| Yes, this application sends about 100K - 200K messages at a time. Also, there are other applications that could put upto 100K messages at a time. |
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| gbaddeley |
| Posted: Mon Aug 25, 2008 6:45 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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| fschofer |
| Posted: Tue Aug 26, 2008 3:19 am Post subject: |
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Knight
Joined: 02 Jul 2001
Posts: 524
Location: Mainz, Germany
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Hi,
| Quote: |
Changes to ulimit only take effect on AIX when files are created. |
i always thought you only have to create a new file system with the Large File Enabled for JFS or use JFS2 and then and copy the files to it.
Greetings
Frank |
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