![]() ![]() ![]() Increasing the Java heap space beyond that value can cause performance problems. What is the ideal heap size It is recommended to increase the Java heap space only up to one-half of the total RAM available on the server. The -X options are non-standard and subject to change without notice. The default maximum Java heap size is 256 MB. Show all locale related settings and continue ![]() Show all property settings and continue -XshowSettings:locale Show all settings and continue -XshowSettings:vm show all vm related settings and continue -XshowSettings:properties XshowSettings show all settings and continue -XshowSettings:all Xshare:auto use shared class data if possible (default ) -Xshare:on require using shared class data, otherwise fail. Xshare:off do not attempt to use shared class data Xrs reduce use of OS signals by Java/VM (see documentation ) -Xcheck:jni perform additional checks for JNI functions Xfuture enable strictest checks, anticipating future default Xloggc: log GC status to a file with time stamps Xincgc enable incremental garbage collection Xnoclassgc disable class garbage collection Xdiag show additional diagnostic messages Xms: we can use this command to set a minimum or initial heap size. Set search path for bootstrap classes and resources Xmx to set maximum heap size (max memory) This command sets the maximum heap size as 512Mb. $ java -X -Xmixed mixed mode execution (default ) -Xint interpreted mode execution only Youâll need to convert manually to MB or GB. It will show xms (InitialHeapSize) and xmx (MaxHeapSize) in bytes. ![]()
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