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| is there a limit on number of Qmgrs on AIX????? |
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| ucbus1 |
 Posted: Wed Apr 30, 2003 7:50 am Post subject: is there a limit on number of Qmgrs on AIX????? |
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Knight
Joined: 30 Jan 2002
Posts: 560
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Folks,
We are having AIX 5.0 new Regatta box with 2 processors ( I could give more hardware specifc data if needed.. after calling the specialists in that area). One of our admins say that there is a limit of 3 queue managers beyond which the preformance suffers.Some how I am NOT convinced of this as I think it is more of the "capabilty/strength" of the Machine (HW) rather than software AIX or os/390.
hence i would like to know if there is a limit on how may queue managesr one can have on AIX box with out hampering perofmance. Every documentation would be helpful in supporting the statements....
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| ucbus1 |
| Posted: Thu May 01, 2003 5:54 pm Post subject: |
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Knight
Joined: 30 Jan 2002
Posts: 560
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| Could somebody help me??? |
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| vmcgloin |
| Posted: Fri May 02, 2003 12:56 am Post subject: |
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Knight
Joined: 04 Apr 2002
Posts: 560
Location: Scotland
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Well we have 13 qmgrs on a 2 processor AIX 4.3.3 box, 8 on another, and 4 on each of our production boxes.
I have never heard of a 3 qmgr limit, though I suppose it does depend how much you are stressing the qmgrs. As you say, it probably depends on hardware limits, rather than any MQ software limits.
Vicky |
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| bduncan |
| Posted: Fri May 02, 2003 9:59 am Post subject: |
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Padawan
Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley
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"hence i would like to know if there is a limit on how may queue managesr one can have on AIX box with out hampering perofmance"
There are too many factors to make a blanket statement like this. For instance, if the "load" is 100 for a single queue manager, and now I add a second queue manager to the same machine, are you going to double the workload (100 + 100 = 200) or are you going to delegate half the first queue manager's work to the second (50 + 50 = 100) ?
Is performance already being hampered and you are hoping to lessen it with a second queue manager? If so, depending on whether the bottleneck is I/O, network, CPU load, etc., a second queue manager may hinder performance, or it may increase overall performance.
All things being equal, I think two queue managers trying to achieve 100 messages processed per second is going to require more resources than a single queue manager trying to achieve 100 messages per second. However if the machine has two NIC cards, and each queue manager uses one, or if the machine has separate SCSI drives and each queue manager's partition is on a different physical drive, etc., all these factors will allow queue managers working in tandem to outperform a single queue manager with the same load...
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Brandon Duncan
IBM Certified MQSeries Specialist
MQSeries.net forum moderator |
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