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PM98530: HIGH ECSA USAGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Unreleased ECSA storage requested by DSNXRTSC
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All DB2 10 for z/OS users of SYSPLEX         *
    *                 PARALLELISM.                                 *
    ****************************************************************
    * PROBLEM DESCRIPTION: High ECSA storage usage in SYSPLEX      *
    *                      PARALLELISM case due to storage leak    *
    *                      when parallel threads are cancelled.    *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    High ECSA storage usage in case where parallel threads are
    cancelled. The problem is when the parallel threads are
    cancelled, in certain cases ECSA storage is not freed during
    cancelling process. So ECSA storage will be accumulated without
    being freed after a long duration of time.
    The problem is not query specific, so we will not have a
    sample query here. Any query running in SYSPLEX parallelism
    could potentially hit this problem.
    

Problem conclusion

  • DB2 has been fixed to free the ECSA storage during
    CANCEL process for SYSPLEX parallelism query. The
    problem no longer occurs after the fix.
    
    Additional keywords: PARALLELISM SYSPLEX
                         DB2PARALL/K  SQLSYSPLEXP
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM98530

  • Reported component name

    DB2 OS/390 & Z/

  • Reported component ID

    5740XYR00

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-10-04

  • Closed date

    2014-03-31

  • Last modified date

    2014-05-02

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

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

    UI16606

Modules/Macros

  • DSNTTRUN DSNXPSEN DSNXRTSC
    

Fix information

  • Fixed component name

    DB2 OS/390 & Z/

  • Fixed component ID

    5740XYR00

Applicable component levels

  • RA10 PSY UI16606

       UP14/04/30 P F404

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

Modified date:
02 May 2014