IV01847: TOO MUCH CPU TIME CONSUMED DURING ZWAS STARTUP

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    

Local fix

  • There are several JVM options that can reduce consumed CPU time
    but the most used one is -Xquickstart. Note however that the
    usage of these workarounds are likely to affect throughput.
    

Problem summary

  • The problem (5-15% more CPU than Java6) is caused by more
    aggressive JIT warm compilations which are needed for higher
    throughput.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.1 GA FP1
    .
    The JIT has been updated to reduce the aggressiveness of certain
    warm compilations during STARTUP only.
    .
    To obtain the fix:
    Install build 20110309 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV01847

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2011-06-15

  • Closed date

    2011-06-15

  • Last modified date

    2011-06-15

  • 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

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R260 PSY

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

260

Reference #:

IV01847

Modified date:

2011-06-15

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