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MQSeries.net Forum Index » General Discussion » slow transmission issue !

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ind76
PostPosted: Wed Oct 22, 2003 7:28 pm    Post subject: slow transmission issue ! Reply with quote

Apprentice

Joined: 10 Apr 2002
Posts: 29
Hi,

We have hub/spoke architecture with MQ running on several NT servers that are connected to MQ running on Z/OS in a non-cluster environment. There is only one XMITQ and channel between the NT machines and Z/OS.

We occassionally see a slow-down in the message transmission during peak hour volume and build-up of messages in XMITQs on NT servers.

Is there any short-term solution before we build a cluster to address this issue ?


Thanks,
ind76
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jhalstead
PostPosted: Thu Oct 23, 2003 2:40 am    Post subject: Reply with quote

Master

Joined: 16 Aug 2001
Posts: 258
Location: London
Can you determine what is causing the bottleneck?

I'm guessing either the network or the disk IO on the Z/OS box. (Are you using persistent mesages?)

Have you checked that there is sufficent network capacity to support the data volumes you are transmitting at peak times? If not it might be worth looking at the channel batch size and batch interval parameters to reduce communication overhead. Maybe bigger batches and a longer interval?

Jamie
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