IBM Support

PI38515: The ability to disable replication status to avoid garbage collection pauses from the memory consumption is needed.

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APAR status

  • Closed as program error.

Error description

  • During the process of gathering replication status a lot of
    memory is consumed on the containers. If this function is not
    available, there should be a mechanism to disable it to avoid
    garbage collection (GC) pauses from the memory consumption.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All WebSphere eXtreme Scale users.          *
    ****************************************************************
    * PROBLEM DESCRIPTION: Replication status polling can consume  *
    *                      a                                       *
    *                      lot of memory on the containers causing *
    *                      GC pauses.                              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The catalog server always runs the replication state polling
    agent. This can consume a lot of memory on the containers. As a
    result you can see unreachable objects piling up in the tenured
    memory waiting to get added to the garbage collection.
    

Problem conclusion

  • A hook was added to disable or enable replication state polling
    in xscmd.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI38515

  • Reported component name

    WS EXTREME SCAL

  • Reported component ID

    5724X6702

  • Reported release

    860

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-04-07

  • Closed date

    2015-05-27

  • Last modified date

    2015-05-27

  • 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

    WS EXTREME SCAL

  • Fixed component ID

    5724X6702

Applicable component levels

  • R860 PSY

       UP

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Document Information

Modified date:
27 May 2015