IBM Support

IV20208: Improve startup performance in the presence of a Java agent

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
    .
    Stack Trace: N/A
    .
    Longer application start-up times when using Java agents.
    

Local fix

Problem summary

  • The presence of a Java agent which uses class redefinition
    causes AOT to be disabled, resulting in longer application
    start-up times when agents are used. This has been improved by
    enabling AOT to be used with class redefinition.
    

Problem conclusion

  • This enhancement will be available in:
    7.0.0 SR1
    6.0.1 SR1
    .
    The JIT has been modified to allow AOT to be used in combination
    with class redefinition by Java agents, resulting in an
    improvement in start-up performance when running Java agents.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV20208

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-04-25

  • Closed date

    2012-04-25

  • Last modified date

    2012-05-01

  • 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



Document information

More support for: Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version: 260

Reference #: IV20208

Modified date: 01 May 2012