Let us begin with the very basic question, why do we need our JVM tuned up? And what exactly is JVM.

JVM, is the instance of Java Runtime Environment, which comes into action whenever you run your application

So, in order to make sure JVM runs fine we require that there is enough space for JVM to run programs. And hence we require timely check on the performance factors and space allotted to the JVM.

The crux of the matter: Heap and Garbage Collection
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