Arthas 生成火焰图

左手的ㄟ右手 2022-09-10 04:17 229阅读 0赞

# 一 点睛 #

> profiler：用于生成火焰图

# 二 代码 #

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(50);
                } 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];
        }
    }

# 三 windows下进入命令界面 #

D:\ProgramFiles\arthas-packaging-3.5.4-bin>jps
    10656 Jps
    12736 Launcher
    2864
    10668 OOMTest
    
    D:\ProgramFiles\arthas-packaging-3.5.4-bin>as.bat 10668
    环境变量 JAVA_TOOL_OPTIONS 没有定义
    JAVA_HOME: D:\ProgramFiles\Java\jdk1.8.0_251
    telnet port: 3658
    http port: 8563
    信息: 用提供的模式无法找到文件。
    telnet wasn't found, please google how to install telnet under windows.
    Try to visit http://127.0.0.1:8563 to connecto arthas server.

# 四 实战 #

[arthas@16852]$ profiler start
    AsyncProfiler error: Current OS do not support AsyncProfiler, Only support Linux/Mac.
    # window下不支持，具体使用见官网
    # https://arthas.aliyun.com/doc/profiler.html
    # 1 启动 profiler
    $ profiler start
    Started [cpu] profiling
    # 2 获取样本数据
    $ profiler getSamples
    23
    # 3 查看状态
    $ profiler status
    [cpu] profiling is running for 4 seconds
    # 4 停止
    $ profiler stop
    # 5 查看生成的火焰图
    http://localhost:3658/arthas-output/

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_19_color_FFFFFF_t_70_g_se_x_16][]

具体某个 JVM 的火焰图

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16][]

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_19_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/0c6c566f4c7a4357b40ed077ced8f2fd.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAY2hlbmdxaXVtaW5n_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/5ee2f40636e04c13b56030092d5da8ce.png