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35 lines (31 loc) · 830 Bytes
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/**
* User: cpucode
* Date: 2021/1/9
* Time: 11:48
* Github: https://github.com/CPU-Code
* CSDN: https://blog.csdn.net/qq_44226094
*/
package com.cpucode.java.string.table;
import java.util.HashSet;
import java.util.Set;
/*
* jdk6中：
* -XX:PermSize=6m -XX:MaxPermSize=6m -Xms6m -Xmx6m
*
* jdk8中：
* -XX:MetaspaceSize=9m -XX:MaxMetaspaceSize=9m -Xms9m -Xmx9m
* */
public class StringOom {
public static void main(String[] args) {
//使用Set保持着常量池引用，避免full gc回收常量池行为
Set<String> set = new HashSet<String>();
//让 PermSize 或 heap 产生OOM了
long i = 0;
while (true){
set.add(String.valueOf(i++).intern());
}
}
}
/*
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
* */