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MQSeries.net Forum Index » IBM MQ Java / JMS » Channel attributes BatchSz and Batch Interval

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Vin
PostPosted: Tue Aug 13, 2002 4:01 pm    Post subject: Channel attributes BatchSz and Batch Interval Reply with quote

Master

Joined: 25 Mar 2002
Posts: 212
Location: India
Can anyone suggest me good values for these both channel attributes? BATCHSZ and BATCHINTL? We are using a request/reply kind of mechanism where in the response recieved for every request is typically in thousands. The platform is Solaris communicating with a MainFrame.
Thanks.
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nimconsult
PostPosted: Tue Aug 13, 2002 9:42 pm    Post subject: Reply with quote

Master

Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium
For request/reply channel types you typically set the batch interval to 0. The purpose is to let the channel close the batch of message as fast as possible (as soon as there is no message left on the transmission queue or the batch size is reached) to ensure optimal response time.

(On the other hand for batch channels you could increase the batch interval value to some seconds)

The batch size is a harder one. When too small, the batches are smaller so you could expect a lower latency time; however you create a significant overhead of continuously transmitting and closing batches. When too high, you minimize the overhead but increase the time of latency.

In the vast majority of applications the default batch size of 50 is an excellent starting point. If you have high workload and critical response time, start from this value, decrease it progressively and see the impact on performance.
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NIMCONSULT Software Architecture Services (Belgium)
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