Understanding JVM: JVM Execution Engine

Now we know that how classes are loaded by Class Loaders, which are part of Class Loader Sub System, next thing that happens is the execution of those class files. JVM Execution Engine is the responsible component for this. It has two components: Interpreter JIT Compiler Interpreter It...

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How to get heap dump of Java Application?

There is a dedicated space where all the objects are stored at runtime. It is called heap. It is created at the time of JVM startup and is configurable using Xms (to be allocated at the time of JVM startup) and Xmx (maximum space to be sued heap) JVM options. The JVM automatically performs Garbage...

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Understanding JVM: Memory Areas in JVM - Part 3

We have already covered Method Area, Heap Area and Stack memory in previous articles. This article will give brief overview of the remaining 2 memory areas in JVM, i.e., PC Registers and Native Method Stack. PC Register (Program Counter Registers) It...

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Understanding JVM: Memory Areas in JVM - Part 2

Stack memory It is maintained per thread, i.e., for every thread in Java, JVM will create a separate stack at the time of thread creation. Each and every method call performed by the thread will be stored in stack including local variable also. After...

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Understanding JVM: Memory Areas in JVM - Part 1

Whenever JVM load and run a Java program, it needs memory to store several things like bytecode, objects, variables, etc. Total JVM memory is organized into following: Method Area Heap Area Stack Area PC Registers Native Method Stack 1. Method Area It is created at the time of JVM startup. .class...

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