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IV87985: Delays observed in MQPUT call when publishing a message using complex subscription selectors

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APAR status

  • Closed as program error.

Error description

  • If an MQ subscriber application publish messages which use
    complex subscription selectors, then the time taken to evaluate
    the selector also increases as the number of logical conditions
    increases, causing an increasing delay in the MQPUT call. The
    performance impact depends on the number of selectors,
    subscribers and the complexity of the selectors.
    

Local fix

  • The MQ subscriber application can use ASYNC put.
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users using complex selector strings.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    Optimisations were possible to the routines used to select
    messages when using complex selector strings.
    

Problem conclusion

  • MQ selector evaluation code has been modified to improve
    performance when using complex selectors.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.9
    v8.0       8.0.0.7
    v9.0 CD    9.0.4
    v9.0 LTS   9.0.0.2
    
    The latest available maintenance can be obtained from
    'WebSphere MQ Recommended Fixes'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
    
    If the maintenance level is not yet available information on
    its planned availability can be found in 'WebSphere MQ
    Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV87985

  • Reported component name

    WMQ AIX V7

  • Reported component ID

    5724H7221

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-08-15

  • Closed date

    2017-06-09

  • Last modified date

    2017-07-06

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

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

Fix information

  • Fixed component name

    WMQ AIX V7

  • Fixed component ID

    5724H7221

Applicable component levels

  • R710 PSY

       UP

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Document Information

Modified date:
09 March 2021