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IV29942: PERF: 1-2% LIBERTY STARTUP DROP 7SR2

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APAR status

  • Closed as program error.

Error description

  • Error Message: There is a 1-2% regression in Liberty Start for
    7SR2, 626SR3 compared to previous release.
    .
    Stack Trace: N/A
    .
    N/A
    

Local fix

  • N/A
    

Problem summary

  • We introduced alternative hashing algorithm in
    HashMap/Hashtable, which cause more cost to initialize
    HashMap/Hashtable new instances.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 SR4
    7.0.0 SR3
    .
    Do not initialize the unused field when alternative hashing
    algorithm is disabled by default.
    

Temporary fix

  • N/A
    

Comments

APAR Information

  • APAR number

    IV29942

  • 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

    2012-10-11

  • Closed date

    2012-10-11

  • Last modified date

    2012-10-21

  • 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 PSY

       UP

  • R700 PSY

       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:
21 October 2012