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| How long is a piece of string?! MQ and Broker |
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| David.Partridge |
 Posted: Mon Sep 17, 2007 4:55 am Post subject: How long is a piece of string?! MQ and Broker |
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Master
Joined: 28 Jun 2001
Posts: 249
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One of my clients has asked in all seriousness how he can determine if his queue managers or brokers are overloaded (or more importantly heading for an overload).
My initial thoughts were that this really boils down to meeting or not meeting an SLA such as will process 1000 NP messages of 1KB per second, or some such.
However his concern appears to be that he wants some metrics he can plug into his monitoring software (e.g. QPasa, Patrol), and scream shout and run about ordering upgraded hardware/more servers if these are breached.
To some extent, this may still boil down to tracking SLAs, but given the nature of "queuing theory", I suspect that you continue to meet the SLA as the load builds up, until the day comes that you don't meet it. At that point of course you bust the SLA in style!!!
I think for broker things *may* be a bit easier, as when all's said and done, you can watch the CPU% consumed by the Execution Groups.
So, do some of you mavens out there have any words of wisdom?
TIA, Dave |
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| Vitor |
| Posted: Mon Sep 17, 2007 5:02 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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It's probably better to take a holistic view. For instance, messages backing up on a queue that should be empty is an indicator of something but you'd need different stats to show what. The reading application (flow?) is not keeping up with the rate of message arrival but is that because a database or other software is responding slowly?
If you're looking for relevant documentation to feed into the debate, try some of the performance monitoring support packs and similar. It's got to be a good line that you monitor WMQ / WMB performance in the same way IBM monitors performance, so plug the same criteria in! 
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Honesty is the best policy.
Insanity is the best defence. |
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| jefflowrey |
| Posted: Mon Sep 17, 2007 5:49 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Most of the monitoring tools out there provide specific add-ons that capture MQ related metrics and Broker related metrics, and OS level metrics as well.
One then has to understand how the business is running on top of MQ and Broker and the OS in order to derive what metrics are important to monitor - and in order to understand how processing X pieces of business on the infrastructure is reflected in the metrics. Then one can derive the likely impact of processing X+Y pieces of business, and determine where things start to break down.
Or one can simply run tests for X+ridiculous and see if things break or still run fine.
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I am *not* the model of the modern major general. |
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