Increase JVM max heap size for Eclipse

Question

I am trying to increase the max heap size for my Eclipse  I have tried specifying in eclipse ini or through the command line  but are not working    My max heap size has the exact same limit before  running jconsole  and after  System out println java lang Runtime getRuntime   maxMemory      starting Eclipse  1 8G   Is there any way to modify JVM heap size before it is launched  ex  a config file   What could I be doing wrong when specifying heap size to Eclipse    This is the command     eclipse eclipse -debug -consoleLog -vmargs -Xms1000m -Xmx6000m -XX -UseGCOverheadLimitcl   This is my eclipse ini  which values are overwritten by the specified eclipse launching parameters    -startup plugins org eclipse equinox launcher 1 3 0 v20120522-1813 jar --launcher library plugins org eclipse equinox launcher gtk linux x86 64 1 1 200 v20120522-1813 -product org eclipse epp package java product --launcher defaultAction openFile -showsplash org eclipse platform --launcher XXMaxPermSize 256m --launcher defaultAction openFile -vmargs -Dosgi requiredJavaVersion 1 6 -Dhelp lucene tokenizer standard -XX MaxPermSize 6000m -Xms1000m -Xmx6000m

User · Answer

--launcher XXMaxPermSize  256m  Try to bump that value up

User · Answer

Try to modify the eclipse ini so that both Xms and Xmx are of the same value   -Xms6000m -Xmx6000m   This should force the Eclipse s VM to allocate 6GB of heap right from the beginning    But be careful about either using the eclipse ini or the command-line   eclipse eclipse -vmargs      It should work in both cases but pick one and try to stick with it

User · Answer

You can use this configuration     -startup plugins org eclipse equinox launcher 1 3 0 v20120522-1813 jar --launcher library plugins org eclipse equinox launcher gtk linux x86 64 1 1 200 v20120913-144807 -showsplash org eclipse platform --launcher XXMaxPermSize 256m --launcher defaultAction openFile -vmargs -Xms512m -Xmx1024m -XX  UseParallelGC -XX PermSize 256M -XX MaxPermSize 512M

User · Answer

It is possible to increase heap size allocated by the Java Virtual Machine  JVM  by using command line options   -Xms lt size gt         set initial Java heap size -Xmx lt size gt         set maximum Java heap size -Xss lt size gt         set java thread stack size   If you are using the tomcat server  you can change the heap size by going to Eclipse Run Run Configuration and select Apache Tomcat your server name Arguments and under VM arguments section use the following   -XX MaxPermSize 256m -Xms256m -Xmx512M   If you are not using any server  you can type the following on the command line before you run your code   java -Xms64m -Xmx256m HelloWorld   More information on increasing the heap size can be found here

[eclipse] Increase JVM max heap size for Eclipse

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