Significance of PermGen Space

Question

What is the significance of PermGen space in java?

Answer 1

The only thing you really need to know is that PermGen space is separate from the general heap and not affected by the -Xmx VM parameter. If you have an application that loads lots of class definitions (like an application server or an IDE) then you can set the PermGen space size using the -XX:MaxPermSize VM option.