PM56174: Asynchronous replication can get behind and not stay current, while under continuous load.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Asynchronous replication does not update enough data on each
    replicating cycle when grids contain a large number of maps.
    While under continuous load, the replica cannot stay current.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  Users of WebSphere eXtreme Scale who have   *
    *                  several maps in their data grids and use    *
    *                  asynchronous replication.                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: Asynchronous replication can fall       *
    *                      behind when the primary is under load.  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    When looking at the revisions information for a primary and
    replica, the replica can fall behind even though the primary
    is able to stay current with a large load.  When many maps
    exist, the replication code is conservative so as not
    to go out of memory when replicating.  Therefore, the
    replication packets sent to the replica can be smaller.
    

Problem conclusion

  • The code was updated to make sure that more data is sent
    during each replication cycle.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM56174

  • Reported component name

    XD EXTREME SCAL

  • Reported component ID

    5724J3402

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-01-17

  • Closed date

    2012-02-01

  • Last modified date

    2012-02-01

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

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

    PM56180

Fix information

  • Fixed component name

    XD EXTREME SCAL

  • Fixed component ID

    5724J3402

Applicable component levels

  • R710 PSY

       UP



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Document information


More support for:

WebSphere eXtreme Scale
General

Software version:

710

Reference #:

PM56174

Modified date:

2012-02-01

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