IBM Support

IT26311: DB2: DB2LOOK -L WILL USE AN EXCESSIVE AMOUNT MEMORY IN PARTITIONED (DPF) ENVIRONMENTS WITH MULTIPLE DMS TABLESPACES.

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APAR status

  • Closed as program error.

Error description

  • In partitioned environment (DPF), db2look with "-l" switch, used
    to obtain the database layout information (tablespaces,
    partition groups etc.), will use an excessive amount of memory
    for databases with a high number of DMS tablespaces.
    
    Depending on the number of tablespaces, it might cause paging or
    even a system crash. Estimated memory usage from the command
    will be:
    
    2MB * <number_of_partitions> * <number_of_dms_tablespaces>
    
    Problem is specific to Db2 version 11.1 Mod 3 Fix Pack 3 (all
    iFixes)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * DPF                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to DB2 version 11.1 Mod 4 Fix Pack 5 or higher.      *
    ****************************************************************
    

Problem conclusion

  • Problem first fixed in DB2 version 11.1 Mod 4 Fix Pack 5.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26311

  • 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

    2018-09-17

  • Closed date

    2019-08-13

  • Last modified date

    2019-08-13

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

    IT26276

  • 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":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
03 May 2022