6.6.3 Java large page support
The IBM SDK on AIX supports the use of large pages through the -Xlp option. To set Java to utilize the larger page sizes, set the -Xlp option in the Generic JVM arguments field in the Java Virtual Machine settings page in the Process Definition. If no option is specified when using -Xlp, it defaults to 16 MB.
The large page sizes are only available to Java if AIX has been configured for large pages. The next section describes how to set up a WebSphere Application Server to utilize large pages.