Out Of Memory Error

<Depth understanding of JAVA Virtual Machine> Chapter II

Out Of Memory Error: Java heap space

　　Heap memory overflow

　　Need to determine is a memory leak or memory overflow

 

StackOverflowError

　　Stack memory overflow, including virtual machine stack, native method stacks

 

PermGen space permanently on behalf of insufficient memory, HotSpotJVM generations is a permanent method area (before JDK1.6 and, runtime constant pool area is also method);

　　The method area is some of the information stored in the class, such as class names, method names, modifiers, such as constant pool, if you create a class method area is filled with lots of code will produce a permanent behalf PermGen space memory overflow exception;