First message send is slow. Please Help!!

[madgenius]

Hi,

We have a simples request and reply set up from an ASP page using a VB DLL to send and receive messages.

On each page load we do a standard MQCONN, MQOPEN, MQPUT, MQGET with a wait on the reply message and then MQCLOSE and MQDISC.

For some reason the first query from the web page takes about 4 or 5 seconds to go through whereas the subsequent queries is taking split seconds. I dont understand this as the same process is being done each time. Is something going to sleep on me? IS there some configuration settiing that I am missing?

Thanks in advance

Frank

 

[GFC]

Often you get slow response on first-time because of overhead in getting channels active, even after going inactive due to lack of traffic.

Garry

 

[madgenius]

Well I know it is something to do with the channels going inactive. I have set the Disconnect intervals on the channels to be zero so the channels arent going inactive at all. Is there anything else I can do?

 

[bduncan]

You can try changing the batch size on your channels. The channel agents use an algorithm to increase effeciency of the channels - sometimes waiting for something else to land on the transmit queue to package into the current batch instead of sending 2 batches. There have been some discussions about this on

http://www.mqseries.net.

Just go there and do a search on batch size...
-Brandon

-----------------------------
Brandon Duncan
IBM Certified MQSeries Specialist, Solutions Expert
Moderator

http://www.MQSeries.net

brandon@mqseries.net