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We have assessed this requirement. We have no current plans for this to be implemented and so 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.
Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - Servers and Systems Software
Product family - Transaction Processing
Product - CICS Transaction Server
For recording keeping, the previous attributes were:
Brand - WebSphere
Product family - Transaction Processing
Product - CICS Transaction Server
This is a candidate for inclusion in a future release, ie to change the weightings so that transaction dumps are weighted separately from system dumps so the regions become undesirable but it is still very possible for their weighting to be surpassed by a heavily loaded region before it gets to MXT.
As a workaround for this today, the customer could consider decreasing their READRS, gradually maybe even down to 10ms (or whatever response time can be tolerated - this could be worked out by looking at their peak TPS rate vs MXT). We would suggest they do this incrementally and keep an eye on the CF load as they do this so they don't overwhelm the CF with reads.
Please see my input below:
Q: Could we find out a little more about the system configuration please?
A: BOC has 4 LPARs, 8 TORs and 16 AORs. They used DB2 as well.
Q: Are you running Sysplex Optimised WLM and/or WLM abend compensation?
A: Yes. BOC is running Sysplex Optimised WLM, but no WLM abend compensation.
Q: How are the regions split between CMAS and LPAR?
A: BOC has 4 LPARs. One CMAS region, 2 TOR regions and 4 AOR regions are running on each LPAR.
Q: Did work route back into the other AORs after the 2 AORs hit the MXT limit?
Was work in the 14 AORs continuing to abend?
A: After the 2 AORs hit the MXT limit, CPSM continue routing work to these 2 AORs, since TOR haven't got the latest information of the 2 AORs (READRS=200ms). Because the abend is caused by the purge operation performed by system admin, so no more abend after the transaction dump.
We have some questions. Please could you add a comment with answers to the following questions:
Could we find out a little more about the system configuration please?
Are you running Sysplex Optimised WLM and/or WLM abend compensation?
How are the regions split between CMAS and LPAR?
Did work route back into the other AORs after the 2 AORs hit the MXT limit?
Was work in the 14 AORs continuing to abend?