JVM 调优实战--VisualVM综合分析可视化工具的使用教程（含远程JMX连接）

朱雀 2023-10-07 08:14 1阅读 0赞

**目录**

--------------------

VisualVM工具的使用

启动VisualVM

概览

查看本地进程

查看CPU、内存、类、线程运行信息

查看线程详细信息

抽样器

监控远程的JVM

什么是JMX

监控远程的tomcat

使用VisualVM连接远程tomcat

--------------------

## VisualVM工具的使用 ##

> VisualVM工具基本涵盖内存分析jmap、线程分析jstack等功能，并且是可视化的，可以远程连接生产环境的服务器进行分析。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70][]

### 启动VisualVM ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 1][]

### 概览 ###

> 主界面：
> 
> 打开之后左侧菜单栏就会显示所有在本台机器上正在运行的JVM进程列表--

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 2][]

> 以idea进程为例--

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 3][]

> 【监视】：【执行垃圾回收】、【堆Dump】、CPU、内存、类、线程、Metaspace元数据空间。
> 
> 堆dump：类、实例数、OQL控制台。
> 
> 【线程】：线程dump，类似于jstack
> 
> 【抽样器】：对【CPU】和【内存】进行采样。

### 查看本地进程 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 4][]

### 查看CPU、内存、类、线程运行信息 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 5][]

### 查看线程详细信息 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 7][]

### 抽样器 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 8][]

### 监控远程的JVM ###

VisualVM不仅可以监控本地的JVM进程，还可以监控远程的JVM进程，需要借助于JMX技术实现。

#### 什么是JMX ####

![20200116110741778.png][]

> JMX可以跨操作系统，也就是Windows和Linux系统可以相互进行网络传输。

#### 监控远程的tomcat ####

> 想要监控远程的tomcat，就需要在远程的tomcat进行JMX的配置，方法如下：
> 
> 修改完成后，重启tomcat生效。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 9][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 10][]

> vi catalina.sh：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 11][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 12][]

#### 使用VisualVM连接远程tomcat ####

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 13][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 14][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 15][]

> 此时就已经远程连接上了--

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 16][]

> 执行堆dump操作时，需要将远程服务器dump文件下载到本地，然后就可以通过VisualVM进行查看了。
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3h1ZWxpYW5nLmJsb2cuY3Nkbi5uZXQ_size_16_color_FFFFFF_t_70 17][]
> 
> ![20200116112615464.png][]

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[20200116112615464.png]: https://img-blog.csdnimg.cn/20200116112615464.png