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Whilst this requirement is valid, based on our current plans and priorities, it is not likely that this could be implemented in the next 12-24 months, or in the next CICS TS release. Correspondingly this requirement is being declined at this point. The requirement will be kept in the RFE system and might be reassessed in the future. You also have an opportunity to resubmit in twelve months time if you wish it to be reconsidered then.
I agree with this requirement and was about to submit this same RFE - You beat me to this RFE by a day! Although I did not open a PMR, I identified this same problem to the application yesterday. The application uses global enq while making a socket call to a service that can take up to a second or two, so the arrival rate always guaranteed that another was waiting on the global enq. My solution to them was to isolate this particular function to one CICS region. They are serializing themselves with Global Enq to one at a time anyway and they can make this change dynamically. Another solution I offered is to use TCLASS=1 as that breaks the cycle of a waiting ENQ. The problem though is that the tranid processes many types of functions, and only this one function needs to be serialized, so tclass=1 limits the throughput of the entire application. They have 4 AOR regions so what we ended running with yesterday was TCLASS=30 in 3 of the regions ( so their other work can process) and TCLASS=1 in the lone region where the serialized function runs. I originally had a higher TCLASS in the lone region but I noticed occasionally a serialized request leaked into the other AORS, so setting TCLASS=1 released the ENQ so they could run.
These actions were to help them until they solve the larger problem of serializing for so long. I have asked the application to change the length of the enq and only serialize when they need to.
As far as a solution from IBM, I can see where this current solution optimizes enque processing, and so switching to FIFO might be resource intensive. Perhaps a flag on the TSMODEL could enable FIFO just for those enqueues that need it? Another choice might be to give it up after a "batch" - after 5 are processed, release the local ownership?
Thanks for bringing up this RFE - it was very timely!
Mike Giaquinto
Wells Fargo