Mac 安装使用Arthas

2022-12-01 本文已影响0人小螺丝钉cici

工具：https://arthas.aliyun.com/

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1.安装arthas

curl -O https://alibaba.github.io/arthas/arthas-boot.jar

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2.启动jar

java -jar arthas-boot.jar

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3.出现所有可监控的进程，输入要监控的进程，回车

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执行监控进程后，报错：【没报错，直接看4】

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[INFO] Start download arthas from remote server: https://arthas.aliyun.com/download/3.6.7?mirror=aliyun
[INFO] File size: 12.92 MB, downloaded size: 9.60 MB, downloading ...
[INFO] Download arthas success.
[INFO] arthas home: /Users/cici/.arthas/lib/3.6.7/arthas
[INFO] Try to attach process 13160
Exception in thread "main" java.lang.IllegalArgumentException: Can not find tools.jar under java home: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home, please try to start arthas-boot with full path java. Such as /opt/jdk/bin/java -jar arthas-boot.jar
    at com.taobao.arthas.boot.ProcessUtils.findJavaHome(ProcessUtils.java:222)
    at com.taobao.arthas.boot.ProcessUtils.startArthasCore(ProcessUtils.java:233)
    at com.taobao.arthas.boot.Bootstrap.main(Bootstrap.java:586)

解决办法：

执行：vim ~/.bash_profile

添加以下内容：
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_261.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH

执行：source ~/.bash_profile

重新启动jar，成功

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4. 启动接口观察

trace com.xx.assetsinnovation.scene.service.impl.xxxServiceImpl queryById -n 50 --skipJDKMethod false '#cost > 200'

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针对部分接口，想进行时间上的过滤

trace com.xx.assetsinnovation.scene.service.impl.xxxServiceImpl queryById -n 5 --skipJDKMethod false '#cost > 200'

5.查看监控的结果

头部位置，说明该接口耗时11s

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发现红色圈起来的部分就是耗时占比严重的地方，针对性的去优化

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6. 接口性能达标，但是每次并发就是上不去

针对权限校验进行检查过滤
trace com.bantu.platform.sso.web.client.cors.CorsSsoAgentFilter doFilterInternal -n 5000 --skipJDKMethod false '#cost > 300'
其中还碰到过arthas监控的服务端口不可用的情况

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