MAT 界面主要功能

灰太狼 2022-09-09 01:53 260阅读 0赞

# 一 代码 #

/**
    * -Xms600m -Xmx600m -XX:SurvivorRatio=8
    * 老年代：400m
    * 伊甸园：160m
    * s0:20m
    * s1:20m
    */
    package chapter03;
    
    import java.util.ArrayList;
    import java.util.Random;
    
    /**
    * -Xms600m -Xmx600m -XX:SurvivorRatio=8
    * 老年代：400m
    * 伊甸园：160m
    * s0:20m
    * s1:20m
    */
    public class OOMTest {
        public static void main(String[] args) {
            ArrayList<Picture> list = new ArrayList<>();
            while (true) {
                try {
                    Thread.sleep(5);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                list.add(new Picture(new Random().nextInt(100 * 50)));
            }
        }
    }
    
    class Picture {
        private byte[] pixels;
    
    
        public Picture(int length) {
            this.pixels = new byte[length];
        }
    }

# 二 通过 jmap 生成 dump 文件 #

> E:\\JVMDemo3>jps
> 
> 11472 Launcher
> 
> 13124
> 
> 15252 OOMTest
> 
> 8612
> 
> 7576 Jps
> 
> E:\\JVMDemo3>jmap -dump:format=b,file=d:mat\_log\\a.hprof 15252
> 
> Dumping heap to D:\\mat\_log\\a.hprof ...
> 
> Heap dump file created

# 三 打开 dump 文件 #

**第一步**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_17_color_FFFFFF_t_70_g_se_x_16][]

**第二步**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_16_color_FFFFFF_t_70_g_se_x_16][]

# 四 通过 MAT 生成 dump #

**第一步**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_12_color_FFFFFF_t_70_g_se_x_16][]

**第二步**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_16_color_FFFFFF_t_70_g_se_x_16 1][]

**第三步**

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_16_color_FFFFFF_t_70_g_se_x_16 2][]

# 五 基本功能 #

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