IBM Support

IV36779: USE OF LARGE PAGES BY DEFAULT ON LINUX X-86 PLATFORMS

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APAR status

  • Closed as program error.

Error description

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

Local fix

Problem summary

  • On certain platforms and processors, the JVM now starts with
    large pages enabled by default for both the JIT code cache and
    the Java object heap, instead of the default operating system
    page size.
    The following sizes apply to Linux:
        Linux on x86 and AMD64/EM64T: 2 MB large pages
    Note: These changes do not apply to Linux on IBM POWER?
    platforms.
    If the operating system is not configured for the large page
    size, or if the correct hardware is not available, the JVM uses
    the default operating system page size instead.
    You can configure the large page size using the -Xlp command.
    For more information about the -Xlp command, see JVM
    command-line options.
    Note: The use of large pages by default is not enabled on
    WebSphere Real Time for Real Time Linux, V3 service refresh 4.
    Use of large pages by default applies only to WebSphere Real
    Time for Linux, V3 service refresh 4.
    Please refer to technotes:
      http://www-01.ibm.com/support/docview.wss?uid=swg21625477
    (WRT-V3 SR4)
    

Problem conclusion

  • This defect will be fixed in:
    WRT-V3 SR4
    .
    N/A
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV36779

  • Reported component name

    WRT VM

  • Reported component ID

    5724R0403

  • Reported release

    300

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-14

  • Closed date

    2013-03-02

  • Last modified date

    2013-03-02

  • 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

    WRT VM

  • Fixed component ID

    5724R0403

Applicable component levels

  • R300 PSY

       UP

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Document Information

Modified date:
02 March 2013