What does JVM flag CMSClassUnloadingEnabled actually do?
I cannot for the life of me find a definition of what the Java VM flag CMSClassUnloadingEnabled actually does, other than some very … Read more
jvm-arguments
Difference between _JAVA_OPTIONS, JAVA_TOOL_OPTIONS and JAVA_OPTS
I thought it would be great to have a comparison between _JAVA_OPTIONS and JAVA_TOOL_OPTIONS. I have been searching a bit for one, but … Read more
What does -XX:MaxPermSize do?
Specifically, why would it help to fix a PermGen OutOfMemoryError issue? Also, bonus points for an answer that points me to the documentation … Read more
How to increase IDE memory limit in IntelliJ IDEA on Mac?
I’m using IDEA 12 Leda on Mountain Lion. I wanted to increase the maximum memory that IDE can use. I set the VMOptions … Read more
“Error occurred during initialization of VM; Could not reserve enough space for object heap” using -Xmx3G
First of all, I have a box with 8gb of ram, so I doubt total memory is the issue. This application is running … Read more
What does -XX:MaxPermSize do?
The permanent space is where the classes, methods, internalized strings, and similar objects used by the VM are stored and never deallocated (hence … Read more