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IT29255: LATCH CONTENTION IN ROUTINE addOrUpdateActivityEntry

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APAR status

  • Closed as program error.

Error description

  • DB2 may encounter performance issues and after collecting stacks
    the stacks may show high latch contention on
    SQLO_LT_sqlrw_wl_estimated_runtime_data__erDataUpdateLatch with
    a stack similar to:
    
    sqloXlatchConflict
    sqlrwAddEstimatedRuntimeData
    addOrUpdateActivityEntry
    sqlmTermActivityMetrics
    sqlrr_remove_curr_activity
    sqlrr_activity_exe_stop
    sqlricls_simple
    
    Or show high latch contention on
    SQLO_LT_sqeWlmActivityPlanHashTable__m_actPlanTableLock with a
    stack similar to:
    
    sqloXlatchConflict
    addOrUpdateActivityEntry
    sqlmTermActivityMetrics
    sqlrr_remove_curr_activity
    sqlrr_activity_exe_stop
    sqlricls_simple
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher                *
    ****************************************************************
    

Problem conclusion

  • First fixed in Db2 11.1 Mod 4 Fixpack 5
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT29255

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-05-23

  • Closed date

    2020-01-16

  • Last modified date

    2020-01-16

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

  • 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

  • RB10 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEPGG","label":"DB2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
16 January 2020