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IV45705: PERF SLOWS ON AIX NFS CLIENT WITH RAPID FILE CREATES IN SAME DIR APPLIES TO AIX 6100-08

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

  • When a lot of new files are created in the same directory
    very rapidly, the attributes on the directory are
    invalidated
    very often. This causes the AIX NFS client to take the
    hit
    of having to purge the DNLC cache frequently. Severe lock
    contention causes the calling application to slow down.
    

Local fix

  • Distribute the files between multiple directories instead
    of creating them all in the same directory. Do not create
    files as fast.
    

Problem summary

  • NFS client slows down while repeatedly & reapidly creating
    files within the same directory.
    

Problem conclusion

  • If a DNLC purge is in progress already, wait for that to
    complete, and then return instead of purging again.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV45705

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2013-07-16

  • Closed date

    2013-07-16

  • Last modified date

    2014-02-17

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

    IV43540

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

    U864769

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U864769

       UP14/02/17 I 1000

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Document Information

Modified date:
17 February 2014