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| Persistant Queue - how to optimized throughpout |
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| Tristan23 |
 Posted: Tue Jun 14, 2011 6:09 am Post subject: Persistant Queue - how to optimized throughpout |
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Newbie
Joined: 25 May 2011
Posts: 9
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Hi there,
I have MQ installed on RHEL.
Question: How can I get optimal performance for persistent queues?
Do I have to tune kernel parameters? If so, which ones?
cheers,
Tristan |
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| zpat |
| Posted: Tue Jun 14, 2011 6:11 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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What's the problem?
MQ performance is generally limited by the disk subsystem speed. Ensure write caching is enabled on your SAN. |
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| Vitor |
| Posted: Tue Jun 14, 2011 6:16 am Post subject: Re: Persistant Queue - how to optimized throughpout |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Tristan23 wrote: |
| Question: How can I get optimal performance for persistent queues? |
As you've been told here don't randomly tune things in the hope it will help. Find the problem and fix it.
Another point - queues are not persistent!! Messages are persistent not queues. Popular topic in here.
One way of getting optimum performance for persistent messages is not to use them if you don't need them.
| Tristan23 wrote: |
| Do I have to tune kernel parameters? If so, which ones? |
The ones in the product documentation, which describes WMQ's kernel requirements. What makes you think you need to change them? Or are you just guessing?
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| PeterPotkay |
| Posted: Tue Jun 14, 2011 6:22 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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| bruce2359 |
| Posted: Tue Jun 14, 2011 2:38 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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In general, WMQ performs optimally out-of-the-box. The Quick Beginnings manual for your platform will suggest o/s settings.
A well-provisioned hardware platform will provide WMQ with sufficient resources to maintain optimal performance. An under-provisioned hardware platform will have insufficient resources for WMQ (and other apps) to perform optimally. Having multiple processors may help, unless they are all over-worked. Having insufficient RAM will increase paging/swapping - which will incur more disk i/o - reducing app throughput.
As mentioned earlier by esteemed colleagues, most throughput issues are application-related - poor design/coding.
Before starting a tuning effort, ask and answer questions like these:
1) is there a performance problem currently? If all of your SLAs are being met, there is no problem.
2) if there is a problem, is the problem pervasive across all application types? or just WMQ applications? or just some WMQ applications?
3) if there is a problem, is it end-user dependent? For example, does the problem occur at the same time each day?
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| mvic |
| Posted: Tue Jun 14, 2011 2:45 pm Post subject: Re: Persistant Queue - how to optimized throughpout |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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