PH40863: IMPROVEMENTS TO CICS TS QUEUE SCAN LOGIC FOR DFHTSCL

Obtain the fix for this APAR.

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 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.