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IZ80934: PERF APPLICATION TAKES 5 MINS+ TO LOAD PAGES AND DOESN'T CASCHE THEM

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APAR status

  • Closed as program error.

Error description

  • Error Message: Customer's application takes up to 5 minutes to
    load pages and does not cache them for the next time they load
    (making them take just as long the next time). At the time this
    happens, CPU usage as monitored in windows task manager goes
    from 0% to an average of 20%, with spikes as high as 100%. The
    same application does not have this behavior on Tomcat, where
    the initial page load may take 3 seconds and is cached (taking
    no time at all) for subsequent loads.
    .
    Stack Trace: N/A
    .
    

Local fix

Problem summary

  • This performance degradation is caused when propertyNames() or
    store(Writer, String) of java.util.Properties is used.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR9
    .
    2 methods of java.util.properties have been refined and updated
    to prevent such a performance gap to happen.
    .
    To obtain the fix:
    Install build 20100814 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ80934

  • Reported component name

    JAVA CLASS LIBS

  • Reported component ID

    620700130

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-07-26

  • Closed date

    2010-08-17

  • Last modified date

    2010-08-17

  • 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

    JAVA CLASS LIBS

  • Fixed component ID

    620700130

Applicable component levels

  • R600 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCVQ3Y","label":"Java Class Libraries"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
17 August 2010