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IT19505: PERFORMANCE OF QUERIES WITH EXISTS PREDICATES DEGRADES AFTER UPGRADE TO FIX PACK 5

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Complex queries that use EXISTS predicates may experience a
    performance degradation after upgrading to DB2 10.1 fix pack 5.
    The total cost - as shown in explain output - increases by
    orders of magnitude compared to previous fix packs.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to 10.5FP9 or later                                  *
    ****************************************************************
    

Problem conclusion

  • Upgrade to 10.5FP9 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT19505

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    A50

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-03-02

  • Closed date

    2020-06-28

  • Last modified date

    2020-06-28

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

    IT14980

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

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"10.5","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
29 June 2020