JDK7和JDK8使用串行回收器SerialGC回收对比

代码

package com.atguigu.java.gc;

/**

 * @author Administrator
 *
 */
public class GcDemo {

	private static final int _1MB = 1024 * 1024;

	public static void main(String[] args) {
		testAllocation();
	}

	public static void testAllocation() {
		byte[] allocation1, allocation2, allocation3, allocation4;
		allocation1 = new byte[2 * _1MB];
		allocation2 = new byte[2 * _1MB];
		allocation3 = new byte[2 * _1MB];
		allocation4 = new byte[4 * _1MB];
	}
}

参数

-Xms20m
-Xmx20m
-Xmn10m
-XX:SurvivorRatio=8
-XX:+UseSerialGC
-XX:+PrintGCDetails

结果对比

JDK7结果图

JDK8结果图

结论

和宋红康老师jvmp198讲解的有出入，求指导