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IC68778: DATABASE CONNECT AND SNAPSHOT TIMES DEGRADE DUE TO TIMESTAMP GENERATION WHEN DATABASE IS SERIALIZED

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APAR status

  • Closed as program error.

Error description

  • On some platforms, the generation of a timestamp can be a
    relatively expensive operation to perform. Some timestamps are
    generated while the database is serialized when new connections
    are arriving or when a database snapshot is being performed. The
    timestamp generation can cause these serialization periods to
    last longer and lead to contention that can cause database
    applications to be delayed.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * On some platforms, the generation of a timestamp can be a    *
    * relatively expensive operation to perform. Some timestamps   *
    * are                                                          *
    * generated while the database is serialized when new          *
    * connections                                                  *
    * are arriving or when a database snapshot is being performed. *
    * The                                                          *
    * timestamp generation can cause these serialization periods   *
    * to                                                           *
    * last longer and lead to contention that can cause database   *
    * applications to be delayed.                                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 Version 9.7 Fix Pack 4                        *
    ****************************************************************
    

Problem conclusion

  • Problem was first fixed in Version 9.7 Fix Pack 4
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC68778

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    970

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-05-20

  • Closed date

    2011-05-03

  • Last modified date

    2011-05-03

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

    IZ76304

  • 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

  • R970 PSY

       UP

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.7"}]

Document Information

Modified date:
10 September 2020