IV04889: PAGING 4K PAGES BECAUSE OF LACK OF 64K PAGE DEMOTIONS APPLIES TO AIX 6100-06

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The system paged out 4k pages even though there was an
    adequate donor pool of 64k pages. Further investigation
    showed that the system was trying to use reserved frames
    instead of demoting 64k pages.
    

Local fix

  • Turn off 64K pages completely or turn off MPSS.
    

Problem summary

  • 4K page working storage pages being stolen when there are
    large number of 64K free pages.
    

Problem conclusion

  • Be more aggressive in MPSS demotion of 64K pages to 4K pages
    and steal more MPSS reserved pages per LRUD invocation.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV04889

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2011-08-09

  • Closed date

    2011-08-09

  • Last modified date

    2013-04-16

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

    IV00210

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U843098

       UP11/10/15 I 1000

PTF to Fileset Mapping



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Document information


More support for:

AIX Enterprise Edition

Software version:

610

Operating system(s):

AIX

Reference #:

IV04889

Modified date:

2013-04-16

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