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| Measuring the Rate and overhead |
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| JRome |
 Posted: Sun Aug 07, 2011 5:58 am Post subject: Measuring the Rate and overhead |
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Joined: 01 Jul 2011
Posts: 15
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I was told by my colleague that if we try to measure the rate of put and rate of get, or even enabling the last put and get parms through the apps will constitute to adding overhead on the system, is it correct even on the latest versions of WMQ 7.0.1 and higher ?.
Is there a way to reduce this overhead ?. |
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| bruce2359 |
| Posted: Sun Aug 07, 2011 6:55 am Post subject: Re: Measuring the Rate and overhead |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| JRome wrote: |
I was told by my colleague that if we try to measure the rate of put and rate of get, or even enabling the last put and get parms through the apps will constitute to adding overhead on the system, is it correct even on the latest versions of WMQ 7.0.1 and higher ?.
Is there a way to reduce this overhead ?. |
When you/your organization installed WMQ, you added overhead to the system. Did you colleague complain about that? According to your colleague, how much system utilization increase? 1%?, 2%?, 25%?, 50%?
Why did you install WMQ? Probably to solve a business problem, to meet a business requirement, to reduce expenses, to become competitive, ...
The project to bring WMQ into your organization should have included the ability to measure WMQ's effectiveness. IBM's Tivoli, and 3rd-party providers, offer software to capture performance data that will allow your organization to manage computer resources.
Every piece of software you install increases demands on hardware. You can call this overhead if you want, but it is the cost of doing business.
In answer to your specific question, generally: only capture data that you need to manage and make business decisions.
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ב''ה
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| Vitor |
| Posted: Sun Aug 07, 2011 7:13 am Post subject: Re: Measuring the Rate and overhead |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| JRome wrote: |
| I was told by my colleague that if we try to measure the rate of put and rate of get, or even enabling the last put and get parms through the apps will constitute to adding overhead on the system, is it correct even on the latest versions of WMQ 7.0.1 and higher ?. |
Of course it's true. Every time you add anything to the system, even a new user, it adds overhead to the system. The impact of a new user is trivial but is there.
| JRome wrote: |
| Is there a way to reduce this overhead ?. |
Reduce it by how much? How much overhead would doing this actually add?
At the moment your colleague is basically telling you that by doing this "the monster in the closet will get you". The first thing you need to determine is if there actually is a monster. Decide what you need to monitor (which is potentially not the same as what you or the business want or think you want to monitor). Set this monitoring up in a load test environment and see how much it actually adds. If resource use jumps 50% then look into what you're monitoring and why, posting back here if necessary. If there seems to be a 1% increase, stick it in production.
And what value does the information hold? If measuring this is important to the business (e.g. to prove or disprove they need to spend $$$ on new hardware) then maybe a 5% overhead is something they'll wear. If this information shows them they can reduce existing hardware spend maybe even more is acceptable.
If it's some middle manager who just feels his weekly report needs another Excel chart then overhead is probably less acceptable. 
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Insanity is the best defence. |
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| bruce2359 |
| Posted: Sun Aug 07, 2011 7:38 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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If you have any programming experience, ponder how many instructions it takes to add 1 to a counter for each put/get.
If you system is near 100% capacity now, what is the point of capturing performance data?
Does your colleague lament about disk space usage, too? Disk space is seen as an overhead to some.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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