aoqi@0:     -Xmixed           mixed mode execution (default)
aoqi@0:     -Xint             interpreted mode execution only
aoqi@0:     -Xbootclasspath:<directories and zip/jar files separated by ;>
aoqi@0:                       set search path for bootstrap classes and resources
aoqi@0:     -Xbootclasspath/a:<directories and zip/jar files separated by ;>
aoqi@0:                       append to end of bootstrap class path
aoqi@0:     -Xbootclasspath/p:<directories and zip/jar files separated by ;>
aoqi@0:                       prepend in front of bootstrap class path
aoqi@0:     -Xnoclassgc       disable class garbage collection
aoqi@0:     -Xincgc           enable incremental garbage collection
aoqi@0:     -Xloggc:<file>    log GC status to a file with time stamps
aoqi@0:     -Xbatch           disable background compilation
aoqi@0:     -Xms<size>        set initial Java heap size
aoqi@0:     -Xmx<size>        set maximum Java heap size
aoqi@0:     -Xss<size>        set java thread stack size
aoqi@0:     -Xprof            output cpu profiling data
aoqi@0:     -Xfuture          enable strictest checks, anticipating future default
aoqi@0:     -Xrs              reduce use of OS signals by Java/VM (see documentation)
aoqi@0:     -Xcheck:jni       perform additional checks for JNI functions
aoqi@0:     -Xshare:off	      do not attempt to use shared class data
aoqi@0:     -Xshare:auto      use shared class data if possible (default)
aoqi@0:     -Xshare:on	      require using shared class data, otherwise fail.
aoqi@0: 
aoqi@0: The -X options are non-standard and subject to change without notice.