先来一段能够内存溢出的程序
public static void main(String[] args) { List<Object> list = new ArrayList<>(); //创建n个1M大小的数组,耗尽内存 for (int i = 0; i < 10000000; i++) list.add(new byte[1024 * 1024]); }
设置jvm参数保留堆栈信息
-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/Users/chengluchao/Desktop/xxx/aaa.dump -XX:+PrintGCDetails -Xms14m -Xmx34m
jdk的bin目录下有许多工具
/Library/Java/JavaVirtualMachines/jdk1.8.0_131.jdk/Contents/Home/bin
找到jvisualvm,双击打开