MAT工具分析OOM例子

HeapOOM.java

//java -Xms20M -Xmx20M -Xmn10M -XX:SurvivorRatio=8 -XX:PermSize=32M -XX:MaxPermSize=64M -XX:+PrintGCDetails -XX:+HeapDumpOnOutOfMemoryError -Xloggc:oom.log HeapOOM
import java.util.*;
public class HeapOOM {
	public static void main(String[] args) {
		List list = new ArrayList();
		int count = 0;
		while(true) {
			count++;
			OOMObject o = new OOMObject("objname" + count);
			if(count%10000==0) {
				System.out.println(count);
			}
			list.add(o);
		}
	}
}

OOMObject.java

public class OOMObject {
	private String objname;
	public OOMObject(String objname) {
		this.objname = objname;
	}
}