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MQSeries.net Forum IndexWebSphere Message Broker SupportAnalyze IIB statistics for instance usage

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alaychem
PostPosted: Wed Jan 30, 2019 4:59 am Post subject: Analyze IIB statistics for instance usage Reply with quote

Acolyte

Joined: 10 Feb 2016
Posts: 63

Is there a way to figure out from the statistics:
1) That the workload is too heavy, and an additional instance is required?
2) That there are too many instances, and some can be discarded?
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Vitor
PostPosted: Wed Jan 30, 2019 9:32 am Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 25469
Location: Ohio, USA

What's wrong with the auto-scaling feature that controls instances?

But yes, using the statistics is the way you determine if you have the instances set correctly.
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alaychem
PostPosted: Thu Jan 31, 2019 1:04 am Post subject: Reply with quote

Acolyte

Joined: 10 Feb 2016
Posts: 63

Vitor wrote:
What's wrong with the auto-scaling feature that controls instances?


Do you suggest to use it by default? there is no overhead when turning this feature on, when not needed?

Vitor wrote:
But yes, using the statistics is the way you determine if you have the instances set correctly.


Is there a better way to do it, other then adding instances, until messages/second does not improve?
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Vitor
PostPosted: Thu Jan 31, 2019 4:16 am Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 25469
Location: Ohio, USA

alaychem wrote:
Vitor wrote:
What's wrong with the auto-scaling feature that controls instances?


Do you suggest to use it by default? there is no overhead when turning this feature on, when not needed?


I'm not entirely sure you can disable it, though someone may know better than me. It's certainly got to be easier and less resource intensive than building a feedback loop where the instances are controlled by the resource stats.

But if you're that worried about overhead, you may have a bigger resource problem.

alaychem wrote:
Vitor wrote:
But yes, using the statistics is the way you determine if you have the instances set correctly.


Is there a better way to do it, other then adding instances, until messages/second does not improve?


Absolutely yes. If that was the case, everyone would just set additional instances to 255 on every single flow and walk away. The statistics will show you what's using resources, where the bottlenecks are, etc., etc. and enables you to build an accurate model of what's in use.

This can (for instance) indicate that you don't need more instances but you need more connections to a database, or that something else on the server is starving the broker of cycles, or any one of a number of things.

It's also important to see how usage changes under various loads, various times of day, that sort of thing.
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PeterPotkay
PostPosted: Thu Jan 31, 2019 4:53 am Post subject: Reply with quote

Poobah

Joined: 15 May 2001
Posts: 7507

This is a good thread to read regarding upping the # of additional instances and why it should be done with some consideration.

http://www.mqseries.net/phpBB2/viewtopic.php?t=75990
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alaychem
PostPosted: Sun Feb 03, 2019 1:31 am Post subject: Reply with quote

Acolyte

Joined: 10 Feb 2016
Posts: 63

Thank you all for the insights.
Also, Iv'e found this page for more information
https://developer.ibm.com/integration/blog/2014/03/20/how-to-use-the-flow-analysis-to-find-further-performance-problems/
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