Hi,

if you have troubles like me in idea because of heap sizes etc. open ( for mac users of course 😉 )

/Applications/IntelliJ IDEA 9.0.1.app/Contents/Info.plist

and in the lower part of the document you will see

<key>VMOptions</key>

change it as you wish, mine is :

<key>VMOptions</key>
<string>-Xms256m -Xmx1024m -XX:MaxPermSize=768m -ea -Xbootclasspath/a:../lib/boot.jar</string>

and I am happy with it :).