A fix is available
APAR status
Closed as program error.
Error description
Improvements to CICS TS queue scan logic for DFHTSCL
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All CICS users. * **************************************************************** * PROBLEM DESCRIPTION: Performance issues when CICS performs a * * scan of TS queues to establish if any * * can be deleted. * **************************************************************** You can use a TSMODEL to set an EXPIRY on a TS-queue. If you install such a TSMODEL in CICS, then CICS will initiate a SCAN process, that will scan main/auxilliary and Coupling Facility (CF) Temporary Storage pools for expired TS queues. This scan process will run in all CICS regions that have a TSMODEL with an EXPIRY specified. The scan will run with an interval of 1/10 of the lowest EXPIRY interval or one minute, whichever is the larger. For example, if you have two TSMODELs, one with: EXPIRY=10(minutes) and one with EXPIRY=30(minutes), then the scan process will run every 1 minute in each CICS region that has the TSMODEL installed. Even when the TSMODEL specifies no POOL (i e local queues) both MAIN/AUXILARY and all CF TS Pools are scanned every minute.
Problem conclusion
The code that scans Temporary Storage queues has been amended to improve its performance. There are documentation updates associated with this APAR and will appear in an update of the IBM Knowledge Centre for CICS.
Temporary fix
Comments
APAR Information
APAR number
PH40863
Reported component name
CICS TS Z/OS V5
Reported component ID
5655Y0400
Reported release
300
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2021-09-24
Closed date
2022-02-11
Last modified date
2022-03-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI79275
Modules/Macros
DFHECEAT DFHEIIC DFHEIQTS DFHEITS DFHESE DFHMETSC DFHMETSE DFHMETSK DFHMIRS DFHMQBID DFHMQCM@ DFHMQP0@ DFHMQP1@ DFHMQP3@ DFHMQR0@ DFHRLRO DFHSIPLT DFHTSAD DFHTSAM DFHTSBR DFHTSCL DFHTSDM DFHTSDQ DFHTSDUC DFHTSDUF DFHTSDUS DFHTSITR DFHTSMB DFHTSMBT DFHTSP DFHTSPT DFHTSQR DFHTSRM DFHTSSH DFHTSSQ DFHTSSR DFHTSST DFHTSWQ DFHWBQM
Fix information
Fixed component name
CICS TS Z/OS V5
Fixed component ID
5655Y0400
Applicable component levels
R300 PSY UI79275
UP22/02/22 P F202
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
02 March 2022