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| hankknowles |
 Posted: Wed May 21, 2008 11:50 am Post subject: Seeking understanding |
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Centurion
Joined: 18 Aug 2003
Posts: 114
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Hello all:
I am a Tandem S/A and do not know about datapower other than we have started using them in our enterprise. The Tandem system has a MQ Qmanager that is getting beat to death by client connections coming from this appliance. In a slow seven hour period it opened and closed over 1200 client connections.
I am seeking any assistance in understanding how we can put a governor or threshold in place to throttle this thing back - the datapower group has 1 static session and allows 4 more dynamic sessions but is there a configuration parm that will allow only static # of client connections and no dynamic or is this just not part of the data power design?
TIA |
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| RogerLacroix |
| Posted: Wed May 21, 2008 7:24 pm Post subject: Re: Seeking understanding |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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Hi,
| hankknowles wrote: |
| In a slow seven hour period it opened and closed over 1200 client connections. |
That's 2.85 connection requests per minute. 
What's the problem? Are you saying that your server has a problem when it receives 1 connection request every 21 seconds (on average)? I think your server needs more hamsters. 
Regards,
Roger Lacroix
Capitalware Inc.
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| gbaddeley |
| Posted: Wed May 21, 2008 8:18 pm Post subject: |
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Jedi Knight
Joined: 25 Mar 2003
Posts: 2538
Location: Melbourne, Australia
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>That's 2.85 connection requests per minute.
I'd only get concerned if it there were that many per second!
It could be doing one connection per transaction or business operation. How long do they stay running for? I suspect just a second or so.
Ideally, MQ Client apps should use connection pooling, where they establish one (or a few) long running connection through which all the transactions flow. It saves resources and improves response time (for low-medium volumes).
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Glenn |
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| Vitor |
| Posted: Thu May 22, 2008 12:05 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| gbaddeley wrote: |
| It could be doing one connection per transaction or business operation. |
This is a common design / coding error.
If it's about 3 a minute in a slow period, what's the connection churn in a busy period? In terms of transaction, 100 times that speed I would consider fast in the average setup.
I'll echo my other associate by suggesting you need more or better hamsters. 
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| Michael Dag |
| Posted: Thu May 22, 2008 4:26 am Post subject: |
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Jedi Knight
Joined: 13 Jun 2002
Posts: 2607
Location: The Netherlands (Amsterdam)
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I don't a Tandem (NSK?) is a small machine, so maybe there are just too many other hamsters in the same cage?
Could be the DataPower box is not pooling the connection and doing MQPUT1's all the time to the same Queue?
and it looks like IBM has not responded to your earlier requests... http://www.mqseries.net/phpBB2/viewtopic.php?t=40931
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Michael
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| hankknowles |
| Posted: Thu May 22, 2008 6:59 am Post subject: |
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Centurion
Joined: 18 Aug 2003
Posts: 114
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| Michael Dag wrote: |
I don't a Tandem (NSK?) is a small machine, so maybe there are just too many other hamsters in the same cage?
Could be the DataPower box is not pooling the connection and doing MQPUT1's all the time to the same Queue?
and it looks like IBM has not responded to your earlier requests... http://www.mqseries.net/phpBB2/viewtopic.php?t=40931 |
Correct Michael Tandem is far from a small system at all!! The datapower appliance is only doing GET's and taking the data and inserting the messages into an oracle DB on some other system. I have another client doing pooling from a WLS box and it may create and delete sessions once per 1/2 hour. While the appliance is continously opening and closing new sessions.
I have been told that the application will run just fine with two static sessions so I guess my question is invalid at this point!
Thanks to those who responded! |
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