IBM Support

PI90276: SET DEFAULT VALUE OF JVM OPTION -XSCMAXAOT TO 8M TO DECREASE APPLICATION SERVER STARTUP TIME.

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The previous value of JVM option -Xscmaxaot of 4M is too small.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server.                                     *
    ****************************************************************
    * PROBLEM DESCRIPTION: The default value of JVM option         *
    *                      -Xscmaxaot should be increased from     *
    *                      4M to 8M when using Java 8.0.           *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    JVM option -Xscmaxaot specifies the amount of "Ahead of Time"
    (AOT) compiled code is available within the Java shared class
    cache during application startup. Increasing the value of
    -Xscmaxaot from 4M to 8M can effect a minor decrease in the
    elapsed startup time of application servers and node agents.
    

Problem conclusion

  • Apply APAR PI90276 to change the value of JVM option
    -Xscmaxaot from 4M to 8M on Application Servers and Node
    Agents that execute on Java 8.0.
    
    The fix for this APAR is currently targeted for inclusion in
    fix pack 9.0.0.6 and 8.5.5.13. Please refer to the Recommended
    Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI90276

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-11-16

  • Closed date

    2017-11-28

  • Last modified date

    2017-11-28

  • 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

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R850 PSY

       UP

  • R900 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
19 October 2021