JVM Memory

•Eden Space (heap): The pool from which memory is initially allocated for most objects.
•Survivor Space (heap): The pool containing objects that have survived the garbage collection of the Eden space.
•Tenured Space (heap): The pool containing objects that have existed for some time in the survivor space.
•Perm Space (non-heap): The pool containing all the reflective data of the virtual machine itself, such as class and method objects. With Java VMs that use class data sharing, this generation is divided into read-only and read-write areas.
•Code Cache (non-heap): The HotSpot Java VM also includes a code cache, containing memory that is used for compilation and storage of native code.