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MQSeries.net Forum IndexIBM MQ Performance MonitoringHow to capture time taken by MQ to handle request-reply msg

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MQMB&WAS
PostPosted: Tue Sep 19, 2017 7:20 am Post subject: How to capture time taken by MQ to handle request-reply msg Reply with quote

Apprentice

Joined: 12 Jun 2016
Posts: 46

Hello,
I need to capture the total time MQ takes to handle a request-reply message (excluding the time taken by the apps to process the msg). Could someone suggest any ways/tools? Thanks.
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Vitor
PostPosted: Tue Sep 19, 2017 7:46 am Post subject: Re: How to capture time taken by MQ to handle request-reply Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 24644
Location: Ohio, USA

MQMB&WAS wrote:
Hello,
I need to capture the total time MQ takes to handle a request-reply message (excluding the time taken by the apps to process the msg). Could someone suggest any ways/tools? Thanks.


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bruce2359
PostPosted: Tue Sep 19, 2017 9:02 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 7856
Location: US: west coast, almost. Otherwise, enroute.

Let's see...

On the client platform
- capture the time/date when the client app MQPUTs the request message
- capture the time/date when the client app MQGETs the reply message
- this encompasses total time, including server app processing

On the server platform (where server app runs), you will need to
- capture time/date when server app MQGETs the request message
- capture time/date when server app MQPUTs the reply message
- this encompasses server app processing

Subtract the server app processing time from total time, and Voila!
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gbaddeley
PostPosted: Tue Sep 19, 2017 5:11 pm Post subject: Reply with quote

Padawan

Joined: 25 Mar 2003
Posts: 1742
Location: Melbourne, Australia

Quote:
Subtract the server app processing time from total time, and Voila!

Correct. This requires timings captured from both platforms that can be correlated by individual transactions. With MQ processing, this really needs to be better than 1 millisecond resolution to get meaningful results. If the client and qmgrs are on different servers, competing network traffic could heavily skew the results.
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zpat
PostPosted: Tue Sep 19, 2017 11:17 pm Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5576
Location: UK

Use support pac IH03 - there are tools in there (other than RFHUTIL) which can be used to drive the application and produce an average response time using a decent sample of messages (which can have varying payloads).

You don't need millisecond precision tools if you test with thousands of messages and calculate the average.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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