PH48005: PERFORMANCE DEGRADATION WHEN USING DYNAMIC QUEUES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Potential performance degradation when using dynamic queues
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 3 Modification 0.                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: Performance degradation when using      *
  *                      dynamic queues.                         *
  ****************************************************************
  During queue creation storage is obtained for collecting queue
  statistics, and the storage is freed during queue deletion.
  
  When running with large numbers of dynamic queues, the high
  amount of queue creation/deletion processing can lead to
  storage fragmentation, resulting in performance degradation.
  

Problem conclusion

• Processing has been changed to collect the required information
  without needing this area of storage, which is no longer
  obtained.
  

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:

  UI81592

Modules/Macros

• CSQICPSD CSQICRE2 CSQIDEL5 CSQIMPU2 CSQMSTA1
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R300 PSY UI81592

     UP22/08/03 P F208 ¢

Fix is available

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