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PM92754: SELECTOR OPTIMISATION IS NOT USED WHEN GETTING MESSAGES FROM SHARED QUEUES.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • When getting messages from a shared queue using a selector
    which could be converted to a match option (matching on
    JMSMessageID, JMSCorrelationID or JMSXGroupID), the selector is
    not correctly converted into a message match option.
    This results in all messages being evaluated against the
    selector which can cause poor performance.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ Version 7          *
    *                 Release 1 Modification 0 and                 *
    *                 Release 0 Modification 1.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: JMS applications getting messages by    *
    *                      JMSMessageID or JMSCorrelationID or     *
    *                      JMSXGroupID from deep queues experience *
    *                      longer response times.                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Documented optimization for JMS applications that get messages
    using only one of the properties JMSMessageID or
    JMSCorrelationID or JMSXGroupId as selectors is not working.
    

Problem conclusion

  • Optimization mechanism has been updated and it is now selecting
    messages using the queue index and the values in the MQMD.
    010Y
    100Y
    CSQMGET
    CSQMGSGW
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM92754

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2013-07-11

  • Closed date

    2013-10-17

  • Last modified date

    2013-12-02

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UK98571 UK98572

Modules/Macros

  • CSQMGET  CSQMGSGW
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UK98571

       UP13/11/20 P F311

  • R100 PSY UK98572

       UP13/11/20 P F311

Fix is available

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Document Information

Modified date:
02 December 2013