-Xbootclasspath:<directories and zip/jar files separated by ;>
              set search path for bootstrap classes and resources
    -Xbootclasspath/a:<directories and zip/jar files separated by ;> 
              append to end of bootstrap class path
    -Xbootclasspath/p:<directories and zip/jar files separated by ;>
              prepend in front of bootstrap class path
    -Xgcprio:[throughput|pausetime]
	      sets prio for the gc-system
		  throughput	optimizes the gc-behavior to achieve optimal
                                throughput (initially starts off with 
                                single-spaced parallel GC mode but may switch
                                to other GC modes dynamically during runtime)
		  pausetime	optimizes the gc-behavior to achieve minimal
                                pause times (initially starts off with 
                                single-spaced concurrent GC mode but may switch
                                to other GC modes dynamically during runtime)
    -Xgc:[singlecon|gencon|parallel]
              used to set a static garbage collector
              will override the -Xgcprio option
                  singlecon     use the single-spaced concurrent garbage
                                collector algorithm (default in client mode)
                  gencon        use the generational concurrent 
                                garbage collector algorithm
                  parallel      use the single-spaced parallel 
                                garbage collector algorithm
                                (default in server mode)
    -Xms<size>[g|G|m|M|k|K]
              sets the initial Java heap size (ms)
                  server mode:  the default value is 25% of the amount 
				of free physical memory in the system 
				up to 64 MB with a minimum of 8 MB (default)
                  client mode:  the default value is 25% of the amount 
				of free physical memory in the system 
				up to 16 MB with a minimum of 8 MB
    -Xmx<size>[g|G|m|M|k|K]
	      sets the maximum Java heap size (mx)
                  server mode:  the default value is the smallest of 75% of
                       		physical memory and 1536 MB (default)
                  client mode: 	the default value is the smallest of 75% of
				physical memory and 64 MB              
    -Xns<size>[g|G|m|M|k|K]
	      sets the initial Java nursery size for generational collectors
                  server mode:  the default value is 10 MB per (default)
                  client mode:  the default value is 2 MB            
    -Xss<size>[g|G|m|M|k|K]
              set initial stack size
    -Xpausetarget=<optimal_pause_time>[ms|s]
              JRockit will optimize the pause time to the given target,
              uses -Xgcprio:pausetime
                  ms            pause time specified in milliseconds (default)
                  s             pause time specified in seconds
    -Xnoclassgc
              disable class garbage collection
    -Xgcpause 
              print pause times caused by the garbage collector
    -Xgcreport   
              write extensive memory report at end of run
    -Xdebug
              enables debugging support in the VM
    -Xrun<library>	    
              loads and runs a library
    -Xjvmpi:[<argument1>=<value1>[,<argumentN>=<valueN>]]
	      enable/disable groups of jvmpi events when running jvmpi
	          entryexit     (default on)
		  allocs        (default on)
		  monitors      (default on)
    -Xmanagement
              enable the management server needed by the 
              JRockit Console
    -Xnoopt   
              do not optimize code
    -Xstrictfp
              always use strict floating point calculations
    -Xverify  
              do full bytecode verification
    -Xnohup or -Xrs
              JRockit will not process CTRL_LOGOFF_EVENT or SIGHUP events
    -Xverbose[:memory|load|jni|cpuinfo|codegen|opt]
              enable verbose output
    -Xverboselog:<file>
              log verbose output to a file 
    -Xverbosetimestamp
              adds a timestampt to the verbose printout
For more information on these options refer to the documentation.
The -X options are non-standard and subject to change without notice.