PM74267: ENABLE FAST LOG APPLY IN ALL CASES DURING DB2 RESTART.

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Code to improve  performance during DB2 restart by making sure
    (FLA) Fast Log Apply is always active during restart.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All Users of DB2                             *
    ****************************************************************
    * PROBLEM DESCRIPTION: ENABLE FAST LOG APPLY IN ALL CASES      *
    *                      DURING DB2 RESTART.                     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Today, Fast Log Apply (FLA) is not always enable during DB2
    restart. This is because, unlike, DB2 main-line data recovery
    which enables FLA based on either external ZPARM (DB2 V9)
    setting or internal zparm setting (DB2 V10), restart is using
    work load manager token to enable FLA function. However, the
    work load manager connection token (ASCECTKN) being used is
    always zero since the connection token was not calculated
    correctly. The Data Manager restart logic is changed so that the
    determination of enabling FLA will not depend on work load
    manager being initialized. FLA will be always active during
    restart. This should help improve the over all performance of
    DB2 restart.
    

Problem conclusion

  • DB2 restart logic is changed so that it will always used FLA
    during the forward log recovery phase.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PM74267

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    910

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-03

  • Closed date

    2013-05-30

  • Last modified date

    2013-07-03

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

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

    UK94713 UK94714

Modules/Macros

  • DSNIARPL DSNIECUR DSNIFLAA DSNIFLAR DSNILHIS DSNILOGA
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UK94713

       UP13/06/14 P F306 ½

  • R910 PSY UK94714

       UP13/06/14 P F306 ½

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

DB2 for z/OS

Software version:

910

Reference #:

PM74267

Modified date:

2013-07-03

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