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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Multiple execution group Vs additional instance

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WBI_user
PostPosted: Tue Mar 19, 2002 9:18 pm    Post subject: Reply with quote

Partisan

Joined: 07 Aug 2001
Posts: 386
I am running MQSI 202 on NT on a 2 CPU Intel box. We did some performance testing by running a batch of messages through MQSI. We took down the elapse time for the batch to complete with the message flow in a single execution group. When we have the flow in 2 execution groups, the elapse time is about half. We then add the flow to a 3rd execution group, the time does change much (less than 5% reduction). I think we have the 2 CPUs fully utilized with the 2 execution group. We cannot turn on additonal incidence until we have time to fix a known problem within the flow.
We were just wondering if there will be a big difference running a flows in two execution group vs running a flow in a single execution group with additional incidence =1.
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kirani
PostPosted: Wed Mar 20, 2002 9:36 am    Post subject: Reply with quote

Jedi Knight

Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
Running the same message flow in two execution group will consume more memory than the other option (setting additional instance=1) as each EG is a seperate process. If you don't have any memory limit then this option gives best throughput.

We achieved almost 2 times more throughput by setting additional instance=1 for a message flow. However, the difference between these two options was not be very big. We achieved around 10% performance gain by deploying a copy of the message flow to 2 execution groups as compared to setting additional instance to 1.
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