What is hprof file?
is the memory image file of the java process, which contains detailed usage information of the memory heap.
I recently studied a book on Java virtual machines and followed the examples in it.
How to open hprof?
The following is the demo:
/** * VM Args:-Xms20m -Xmx20m -XX:+HeapDumpOnOutOfMemoryError * @author zzm */ public class HeapOOM { static class OOMObject { } public static void main(String[] args) { List<OOMObject> list = new ArrayList<OOMObject>(); while (true) { list.add(new OOMObject()); } } }
Program execution effect:
The hprof file path generated here:
E:\IdeaProjects\java-virtual\java_pid2432.hprof
If you open this kind of file, you can Use the following software:
Memory Analyzer
Official website: http://www.eclipse.org/mat/downloads.php
Double-click to open and load the corresponding hprof.
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