| 1 | -Xmixed           mixed mode execution (default) | 
 
 
 
 
 | 2 | -Xint             interpreted mode execution only | 
 
 
 
 
 | 3 | -Xbootclasspath:<directories and zip/jar files separated by ;> | 
 
 
 
 
 | 4 | set search path for bootstrap classes and resources | 
 
 
 
 
 | 5 | -Xbootclasspath/a:<directories and zip/jar files separated by ;> | 
 
 
 
 
 | 6 | append to end of bootstrap class path | 
 
 
 
 
 | 7 | -Xbootclasspath/p:<directories and zip/jar files separated by ;> | 
 
 
 
 
 | 8 | prepend in front of bootstrap class path | 
 
 
 
 
 | 9 | -Xnoclassgc       disable class garbage collection | 
 
 
 
 
 | 10 | -Xincgc           enable incremental garbage collection | 
 
 
 
 
 | 11 | -Xloggc:<file>    log GC status to a file with time stamps | 
 
 
 
 
 | 12 | -Xbatch           disable background compilation | 
 
 
 
 
 | 13 | -Xms<size>        set initial Java heap size | 
 
 
 
 
 | 14 | -Xmx<size>        set maximum Java heap size | 
 
 
 
 
 | 15 | -Xss<size>        set java thread stack size | 
 
 
 
 
 | 16 | -Xprof            output cpu profiling data | 
 
 
 
 
 | 17 | -Xfuture          enable strictest checks, anticipating future default | 
 
 
 
 
 | 18 | -Xrs              reduce use of OS signals by Java/VM (see documentation) | 
 
 
 
 
 | 19 | -Xcheck:jni       perform additional checks for JNI functions | 
 
 
 
 
 | 20 | -Xshare:off       do not attempt to use shared class data | 
 
 
 
 
 | 21 | -Xshare:auto      use shared class data if possible (default) | 
 
 
 
 
 | 22 | -Xshare:on        require using shared class data, otherwise fail. | 
 
 
 
 
 | 23 |  | 
 
 
 
 
 | 24 | The -X options are non-standard and subject to change without notice. |