IC84355: USING MON, MONTH, DAY, DY IN THE FORMAT STRING IN FUNCTION TO_TIMESTAMP OR TIMESTAMP_FORMAT CAN AFFECT PERFORMANCE OF QUERY

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Using MON, MONTH, DAY, Dy in the format string in TO_TIMESTAMP
    or TIMESTAMP_FORMAT can affect the performance of the query due
    to excessive calls to sqlnls_fmblk_callback or
    sqlnls_gmblk_callback driving the contention on the memory latch
    higher thus affecting the overall performance of the query.
    
    This issue does not happen in DB2 v95 or lower.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Customer on DB2 levels above v95                             *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 v10 fixpack 1                                 *
    ****************************************************************
    

Problem conclusion

  • Fixed in v10 fixpack 1
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC84355

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    A10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-06-13

  • Closed date

    2012-12-10

  • Last modified date

    2012-12-10

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

    IC81279

  • 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

  • RA10 PSN

       UP



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Document information


More support for:

DB2 for Linux, UNIX and Windows

Software version:

10.1

Reference #:

IC84355

Modified date:

2012-12-10

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