IBM User Guide for Java V7 on Windows > Reference > Command-line options > JVM command-line options



-Xlp

Requests the JVM to allocate the Java™ object heap with large pages.

-Xlp[<size>]
Windows: Requests the JVM to allocate the Java object heap with large pages. This command is available only on Windows Server 2003 and later, and Windows Vista, and later releases.
For more information, see Configuring large page memory allocation.
AIX, Linux, Windows, and z/OS: If a <size> is specified, the JVM attempts to allocate the JIT code cache memory using pages of that size. If unsuccessful, or if executable pages of that size are not supported, 1M pageable is attempted. If 1M pageable is not available, the JIT code cache memory is allocated using the default or smallest available executable page size.
All platforms: To obtain the large page sizes available and the current setting, use the -verbose:sizes option. Note the current settings are the requested sizes and not the sizes obtained. For object heap size information, check the -verbose:gc output.
There is no error message issued when the operating system does not have sufficient resources to satisfy the request. This limitation and a workaround for verifying the page size used can be found in Known issues and limitations.

For more information, see Configuring large page memory allocation.


Parent: JVM command-line options








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