IBM Support

IT26023: ON AIX ENABLE MALLOCOPTIONS TO BE OPTIMIZED FOR MEMORY OR PERFORMANCE

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APAR status

  • Closed as program error.

Error description

  • At V10.0.0.10 the MALLOCOPTIONS default parameter used by IBM
    Integration Bus was optimized for performance. However this can
    result in excessive memory fragmentation and memory consumption
    for message flows where the size of the input messages is very
    variable.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of IBM Integration Bus V10 and IBM App Connect
    Enterprise V11 on AIX where the input messages have a large
    variation in size.
    
    
    Platforms affected:
    AIX
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    At IIB V10.0.0.10 the MALLOCOPTIONS default parameter used by
    IBM Integration Bus was optimized for performance.
    
    However this can result in excessive memory fragmentation and
    memory consumption for message flows where the size of the input
    messages is very variable.
    

Problem conclusion

  • The product has been modified to allow a user to switch the
    preferred model using an environment variable:
    
    MQSI_MALLOCOPTIONS_OPTIMIZE=<Value>
    
    Where 'Value' is either 'MEMORY' to optimize for memory
    consumption
                                         or 'CPU'         to
    optimize for CPU usage (this is the default).
    
    When a user has been previously advised by IBM support to enable
    the environment variable "MQSI_FREE_MASTER_PARSERS", that
    configuration works best when combined with
    MQSI_MALLOCOPTIONS_OPTIMIZE=MEMORY.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v10.0      10.0.0.18
    v11.0      11.0.0.6
    
    The latest available maintenance can be obtained from:
    http://www-01.ibm.com/support/docview.wss?rs=849&uid=swg27006041
    
    If the maintenance level is not yet available,information on
    its planned availability can be found on:
    http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26023

  • Reported component name

    INTEGRATION BUS

  • Reported component ID

    5724J0540

  • Reported release

    A00

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-08-20

  • Closed date

    2019-09-30

  • Last modified date

    2019-09-30

  • 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

    INTEGRATION BUS

  • Fixed component ID

    5724J0540

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSNQK6","label":"IBM Integration Bus"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
30 September 2019