JVM (ii)------Common memory overflow analysis and simulation for each runtime database

First, heap overflow

JVM parameter-xms11m-xmx40m

Run code

     Public Static void Main (string[] args)  {        List<bytenew arraylist<>();         int i=0;          while (true) {            list.add (newbyte[5*1024*1024]);            System.out.println ("Number of Allocations:" + (+ +i));}    }

Run results

Allocation number of times: 1 allocation number of times: 2 Allocations: 3 Allocations: 4 Allocations: 5 allocations: 6Exception in thread "main" Java.lang.OutOfMemoryError:Java Heap Spaceat Stack.main (stack.java:15) Process finished with exit code 1

Analysis: The heap is a part of all thread sharing in the JVM, primarily the instance object, and there is a heap overflow problem when the instance object needs to allocate more memory than the heap's maximum memory.

Oh, I don't want to write it.

JVM (ii)------Common memory overflow analysis and simulation for each runtime database