Visual VM 监控工具基本功能

拼搏现实的明天。 2022-09-08 05:58 160阅读 0赞

# 一 主要功能 #

*  1.生成/读取堆内存/线程快照
 *  2.查看 JVM 参数和系统属性
 *  3.查看运行中的虚拟机进程
 *  4.程序资源的实时监控
 *  5 生成/读取线程快照
 *  6.JMX 代理连接、远程环境监控、CPU 分析和内存分析

官方地址：[https://visualvm.github.io/index.html][https_visualvm.github.io_index.html]

# 二 基本使用 #

## 1 代码1 ##

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];
        }
    }

## 2 代码2 ##

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 HeapInstanceTest {
        byte[] buffer = new byte[new Random().nextInt(1024 * 100)];
    
        public static void main(String[] args) {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            ArrayList<HeapInstanceTest> list = new ArrayList<>();
            while (true) {
                list.add(new HeapInstanceTest());
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

## 3 进程查看 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_21_color_FFFFFF_t_70_g_se_x_16][]

## 4 概述 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_32_color_FFFFFF_t_70_g_se_x_16][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_36_color_FFFFFF_t_70_g_se_x_16][]

## 5 监视 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16][]

## 6 线程 ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16 1][]

## 7 Visual GC ##

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16 2][]

[https_visualvm.github.io_index.html]: https://visualvm.github.io/index.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_21_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/561dcdd1cd3d4484b8506c339f7401e1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_32_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/40d59a435d7f4366b21ee88b526aaf3f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_36_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/26d3f0c204b34bc1a386579ca5a57ddc.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/c8668682fe214487b10c7ba40d223f3f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220829/e9112317f1f54cbb99d578c91bce51ff.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_39_color_FFFFFF_t_70_g_se_x_16 2]: /images/20220829/a5105046b7634bff955d37854a37deca.png