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PH48005: PERFORMANCE DEGRADATION WHEN USING DYNAMIC QUEUES

A fix is available

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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 number

    PH48005

  • Reported component name

    IBM MQ Z/OS V9

  • Reported component ID

    5655MQ900

  • Reported release

    300

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2022-07-14

  • Closed date

    2022-07-21

  • Last modified date

    2022-09-01

  • 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

  • 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:
01 September 2022