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IZ18366: ENABLING STMM TUNING OF SORTHEAP COULD CAUSE A PERFORMANCE DEGRA DATION RUNNING QUERIES WITH VERY LARGE SORTS ON LINUX.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • On DSS systems on Linux the using of STMM and SORTHEAP set to
    AUTOMATIC could cause a performance degradation running queries
    with very large sorts.Degradation is caused by overhead of
    timeticks converion function during extensive STMM monitoring
    of sort memory.
    

Local fix

Problem summary

  • ENABLING STMM TUNING OF SORTHEAP COULD CAUSE A
    PERFORMANCE DEGRADATION RUNNING QUERIES WITH VERY LARGE SORTS ON
    LINUX.
    

Problem conclusion

  • Fixed in fixpak 1 for v95
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ18366

  • Reported component name

    DB2 UDB ESE AIX

  • Reported component ID

    5765F4100

  • Reported release

    950

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2008-03-24

  • Closed date

    2008-05-20

  • Last modified date

    2008-05-20

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

    IZ11624

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

Modules/Macros

  • ENG_STMM
    

Fix information

  • Fixed component name

    DB2 UDB ESE AIX

  • Fixed component ID

    5765F4100

Applicable component levels

  • R950 PSN

       UP



Document information

More support for: DB2 for Linux, UNIX and Windows

Software version: 950

Reference #: IZ18366

Modified date: 20 May 2008


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