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