Metaspace (PermGen in older Java versions) - Metaspace stores the Class definitions of your Objects, and some other metadata.Ĭode cache - The JIT compiler stores native code it generates in the code cache to improve performance by reusing it. The stack is cleaned up as stack frames move out of context so there is no GC performed here. The stack stores primitive local variables and object references along with the call stack (list of method invocations) itself. Thread stacks - Each thread has its own call stack. Heap - The heap is where your Class instantiations or “Objects” are stored.
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