IBM Support

IT27078: MEMORY ALLOCATED BY A MONITOR FUNCTION ON STANDBY MIGHT NOT BE FREED UP AND MIGHT LEAK AFTER DATABASE IS DEACTIVATED/TAKEOVER

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • The fix for APAR IT19483 is incomplete, as a result, even with
    its fix, the memory allocated by the monitor function on a HADR
    standby database might not be freed up properly and might leak
    after the database is deactivated/takeover.
    
    It can be checked by the following command for monh pool (PoolID
    11). Memory allocated by File:2241390729 and LOC:905 is not
    freed for a long time. (LOC 905 might be changed depending on
    the Fix Pack.)
    
    > db2pd -memblocks 11 sort
    
    <skipped>
    Memory blocks sorted by size for monh subpool: (PoolID: 11,
    SecondID: 0, PoolAddr: 0x078000000002F328)
    PoolID     PoolName   TotalSize(Bytes)     TotalCount LOC   File
    
    11         monh       27488322             138356     1162
    2241390729
    Total size for monh subpool: 27488322 bytes (PoolID: 11,
    SecondID: 0, PoolAddr: 0x078000000002F328)
    <skipped>
    

Local fix

  • Have to restart the instance to free up the leaked memory.
    

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

    IT27078

  • 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

    2018-11-26

  • 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":"BU053","label":"Cloud & Data Platform"},"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