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IV27014: REDUCE EARLY WORKING STORAGE PAGING APPLIES TO AIX 7100-01

A fix is available

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APAR status

  • Closed as program error.

Error description

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:
    * Users of the AIX 7100-01 Technology Level with the vmo
    * tunable "numperm_global = 1" set.
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * Paging of computational storage pages is occurring when a
    * high percentage of memory is being used for the file cache.
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV27014.
    * Prior to APAR availability, interim fixes are available at:
    * ftp://public.dhe.ibm.com/aix/ifixes/iv27014/
    * IV27014s04 for 7100-01-04
    * IV27014s05 for 7100-01-05
    ****************************************************************
    

Problem conclusion

  • LRU processing changed to perform file only 4K page stealing
    when 64K page size is at maxpin condition and there are 4K file
    pages available to steal in the mempool.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    IV27014

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Submitted date

    2012-08-24

  • Closed date

    2012-08-24

  • Last modified date

    2013-04-09

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

    IV26272

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U852289

       UP12/12/10 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV27014

Modified date: 09 April 2013