intellij中应在哪里配置最大堆大小？

Question

Under Preferences -> Compiler -> Java Compiler I notice that Additional Command line properties and maximum heap size can be configured.

For these to take effect, I restart IntelliJ. However, I still keep getting Out of memory error on one of my programs.

I also noticed the idea.vmoptions file where the settings still are:

~/Documents $ more /Applications/IntelliJ\ IDEA\ 12.app/bin/idea.vmoptions 
-Xms128m
-Xmx750m
-XX:MaxPermSize=350m
-XX:ReservedCodeCacheSize=96m
-XX:+UseCodeCacheFlushing
-XX:+UseCompressedOops

Question

I want to use UseConcMarkSweepGC and raise max heap size to 4gb. Where should I be doing this for it to take effect in IntelliJ? I am using Intellij12

Answer 1

Just open file idea.vmoptions with TextEdit and change config as you like :)

-Xms128m
-Xmx4G  // change this 
-XX:MaxPermSize=350m
-XX:ReservedCodeCacheSize=96m
-XX:+UseCodeCacheFlushing
-XX:+UseCompressedOops
-XX:+UseConcMarkSweepGC // and add this

Compiler options - it's options for execute javac.

But one question: Why you want so huge heap for Idea?

If you have OOM when you run project, try change Run options (not compiler and not IDE).