IBM Support

IC99891: WHEN VP_MEMORY_CACHE_KB IS ENABLED, DRAINABLE POOLS CAN HOLD ONTO MORE FREE MEMORY THAN IF IT IS DISABLED

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APAR status

  • Closed as program error.

Error description

  • When using the VP_MEMORY_CACHE_KB feature, there appears to be
    more strict restrictions around when memory is freed back to a
    pool, if that memory can then be drained from the pool (and
    either be returned to the vp cache or back to the global free
    memory block list).
    
    This can lead to pools that have much larger total sizes than
    used sizes (so you could see large sizes for a pools total size,
    but you also see only a small portion of the memory in that pool
    is used, which means it has a large amount of free memory in the
    pool, which could possibly be drained from the pool and given
    back to the rest of the instance).
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * all users                                                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Update to IDS-11.70.xC9                                      *
    ****************************************************************
    

Problem conclusion

  • Problem Fixed In IDS-11.70.xC9
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC99891

  • Reported component name

    INFORMIX SERVER

  • Reported component ID

    5725A3900

  • Reported release

    B70

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-03-06

  • Closed date

    2017-06-09

  • Last modified date

    2017-06-09

  • 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

    INFORMIX SERVER

  • Fixed component ID

    5725A3900

Applicable component levels

  • RA10 PSN

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B70","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
09 June 2017