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| zpat |
 Posted: Tue Sep 04, 2007 3:00 am Post subject: Max MQ clients on a Windows queue manager? |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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I am interested to know how many concurrent MQ client connections can be handled by a single Windows queue manager without issues of reliability, or performance.
Does anyone have experience of say 5,000 concurrent, active, MQ client connections to a single client channel on single Windows Queue Manager?
Can it run reliably for long periods of time? |
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| fjb_saper |
| Posted: Tue Sep 04, 2007 3:04 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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You'd have to run tests and check
a) the machine is disk bound
b) the machine is IO bound
d) the machine is CPU bound
Enjoy 
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MQ & Broker admin |
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| jefflowrey |
| Posted: Tue Sep 04, 2007 3:35 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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And there's a difference between 5,000 heavily active clients, and 5,000 mostly passive clients.
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I am *not* the model of the modern major general. |
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| zpat |
| Posted: Tue Sep 04, 2007 4:10 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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Lets say one message per minute per channel.
I am not looking for throughput guidance, more whether Windows and it's IP stack has stabliity issues with a large number of connections.
Does anyone operate a Wintel QM with more than 2000 client channel connections? |
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| jefflowrey |
| Posted: Tue Sep 04, 2007 4:56 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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I remember Peter Potkay having some things to say on this subject a couple of years ago.
I've seen also a few posts from people having trouble getting more than 1 or 2k client connections going to Windows, and having to do some kind of kernel or network stack tuning...
But that's about all I can say.
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I am *not* the model of the modern major general. |
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| PeterPotkay |
| Posted: Wed Sep 05, 2007 4:13 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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We have Windows servers with up to 2,500 client connections no problem. And these are older servers. Win2K SP4, MQ 5.3.11, only 4gig memory.
This is as classic a It-Depends question as you can get. Size of messages, # of messages, other MQ API calls, etc all come into play. I tried desperatly to get IBM to give me some formula to determine how many channels a QM can run. They didn't and now I know why.
There are a couple of posts by me on this subject. They all come to that same conclusion. It depends. 
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Peter Potkay
Keep Calm and MQ On |
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