IBM Support

IT31310: SIGSEGV DURING LOAD WHEN SELF TUNING MEMORY IS ENABLED

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APAR status

  • Closed as program error.

Error description

  • When stmm (self tuning memory manager) is enabled, the LOAD
    utility may encounter a segmentation fault in the monitor
    component when trying to update statement level high watermark
    shared sort memory usage.
    
    The call stack of the agent that receives the segmentation fault
    may look similar to the following:
    
    sqlsReserveSharedSortSpace
    stmmReserveSortMemoryForSortMemSim
    stmmAllocSortListMonitor
    stmmStartSortListMonitor
    sqlsCreateSort
    sqlscrea
    sqluDMSortInit
    squInitLoadSort
    

Local fix

  • Temporarily disabling stmm during execution of the LOAD command
    will avoid this problem.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 v11.1m4fp6.                                   *
    ****************************************************************
    

Problem conclusion

  • First fixed in Db2 v11.1m4fp6.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT31310

  • 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

    2019-12-17

  • Closed date

    2021-03-31

  • Last modified date

    2021-03-31

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

    IT31297

  • 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

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"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":"11.1"}]

Document Information

Modified date:
01 April 2021