MQSeries.net :: View topic - Controlling Q processing under CICS

amreinm · Posted: Mon Oct 25, 2010 11:02 pm Post subject:

Hi folks!
Sure I could find some useful advice within the many existing threads covering CKTI usage etc - but it seems simpler to present my current scenario here and ask for suitable suggestions.

Messages are placed to a cluster queue (with multiple (maybe 2 ... 4 occurences) and the aim is to have them processed as efficiently as possible, but in a controlled way within CICS.
I understand that using CKTI with TRIGTYPE=FIRST would just start one processing CICS transaction per region.
We'd like to be able to run multiple transactions per region in parallel, as there maybe situations where a huge number (100,000+) messages are showing up within a very short time.
I understand that with TRIGTYPE=EVERY, CKTI would attempt to START a processing transaction for each message- which would some kind of "flood" the CICS region.
Sure, I could limit the number of processing TXs becoming active by the TRANCLASS limit (with immediate purge of all started TXs that hit the limit)- but that seems not to be a smart solution to me -- in the case when masses of messages occur, this would result in lots of thousands of failing STARTs, wouldn't it?
So does anyone have an idea how we could limit the number of parallel transactions executing per CICS region to a particular number (say 3 or 5) efficiently ?
thanks, Marcel