我创建了一个简单的java程序：-

import java.util.ArrayList;
import java.util.List;
import java.lang.management.ManagementFactory;

public class OOMError {

    public static List<Person> list = new ArrayList<>();

    public static void main(String args[]){

    System.out.println("Process Id: "+ManagementFactory.getRuntimeMXBean().getName());
        try{
            while(true){
                List<Person> innerList = new ArrayList<>();

                for(int i=0;i<1000000;i++) {
                    list.add(new Person());
                }

                int count = 0;

                while(count < 60){
                    for(int i=0;i<100000;i++){
                        innerList.add(new Person());
                    }
                    Thread.sleep(1000*60);
                    count=count+5;
                }

                Thread.sleep(1000*60*10);

            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }

    public static class Person{
        private String fName ;
        private String lName;

        Person(){
            fName = new String("Stack");
            lName = new String("Overflow");
        }
    }
}

我用export java_opts='-xms128m-xmx1024m'运行了这个程序
我通过top命令监视java应用程序ram的使用情况。

Processes: 94 total, 10 running, 2 stuck, 82 sleeping, 2765 threads                                                                                           06:59:51
Load Avg: 2.62, 2.74, 2.68  CPU usage: 0.11% user, 0.54% sys, 99.33% idle  SharedLibs: 13M resident, 25M data, 0B linkedit.
MemRegions: 28079 total, 19G resident, 24M private, 3449M shared. PhysMem: 2776M wired, 19G active, 3718M inactive, 25G used, 39G free.
VM: 605G vsize, 1199M framework vsize, 118994555(0) pageins, 0(0) pageouts. Networks: packets: 80924129/10G in, 112346940/77G out.
Disks: 4011149/367G read, 9149138/634G written.

PID    COMMAND      %CPU   TIME     #TH   #WQ  #POR #MRE RPRVT  RSHR RSIZE  VPRVT  VSIZ PGRP  PPID  STATE   UID  FAULTS  COW  MSGS MSGR SYSBSD  SYSMACH CSW     PAGE
89038  java         0.0    02:01.65 31    2    112  437  1237M  10M  1251M  2101M  19G  89038 88799 stuck   501  321189  448  651  300  250145+ 358994  304415+ 0

我很惊讶，当我的最大堆大小是1024m并且状态是“卡住”时，我的rsize字段是1251m？
一旦我的堆满了会发生什么？申请会终止吗？
我正在使用os x 10.x.x