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< h1 > 进阶使用< a class = "headerlink" href = "#id1" title = "永久链接至标题" > ¶< / a > < / h1 >
< div class = "section" id = "id2" >
< h2 > 基础命令< a class = "headerlink" href = "#id2" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > help——查看命令帮助信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "cat.html" > < span class = "doc" > cat< / span > < / a > ——打印文件内容， < / p > < / li >
< li > < p > < a class = "reference internal" href = "echo.html" > < span class = "doc" > echo< / span > < / a > – ， < / p > < / li >
< li > < p > < a class = "reference internal" href = "grep.html" > < span class = "doc" > grep< / span > < / a > ——匹配查找， < / p > < / li >
< li > < p > < a class = "reference internal" href = "tee.html" > < span class = "doc" > tee< / span > < / a > ——复制标准输入到标准输出和指定的文件， < / p > < / li >
< li > < p > < a class = "reference internal" href = "pwd.html" > < span class = "doc" > pwd< / span > < / a > ——返回当前的工作目录， < / p > < / li >
< li > < p > cls——清空当前屏幕区域< / p > < / li >
< li > < p > session——查看当前会话的信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "reset.html" > < span class = "doc" > reset< / span > < / a > ——重置增强类，将被 Arthas 增强过的类全部还原， < / p > < / li >
< li > < p > version——输出当前目标 Java 进程所加载的 Arthas 版本号< / p > < / li >
< li > < p > history——打印命令历史< / p > < / li >
< li > < p > quit——退出当前 Arthas 客户端，其他 Arthas 客户端不受影响< / p > < / li >
< li > < p > stop——关闭 Arthas 服务端，所有 Arthas 客户端全部退出< / p > < / li >
< li > < p > < a class = "reference internal" href = "keymap.html" > < span class = "doc" > keymap< / span > < / a > ——Arthas快捷键列表及自定义快捷键< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "jvm" >
< h2 > jvm相关< a class = "headerlink" href = "#jvm" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > < a class = "reference internal" href = "dashboard.html" > < span class = "doc" > dashboard< / span > < / a > ——当前系统的实时数据面板< / p > < / li >
< li > < p > < a class = "reference internal" href = "thread.html" > < span class = "doc" > thread< / span > < / a > ——查看当前 JVM 的线程堆栈信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "jvm.html" > < span class = "doc" > jvm< / span > < / a > ——查看当前 JVM 的信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "sysprop.html" > < span class = "doc" > sysprop< / span > < / a > ——查看和修改JVM的系统属性< / p > < / li >
< li > < p > < a class = "reference internal" href = "sysenv.html" > < span class = "doc" > sysenv< / span > < / a > ——查看JVM的环境变量< / p > < / li >
< li > < p > < a class = "reference internal" href = "vmoption.html" > < span class = "doc" > vmoption< / span > < / a > ——查看和修改JVM里诊断相关的option< / p > < / li >
< li > < p > < a class = "reference internal" href = "perfcounter.html" > < span class = "doc" > perfcounter< / span > < / a > ——查看当前 JVM 的Perf Counter信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "logger.html" > < span class = "doc" > logger< / span > < / a > ——查看和修改logger< / p > < / li >
< li > < p > < a class = "reference internal" href = "getstatic.html" > < span class = "doc" > getstatic< / span > < / a > ——查看类的静态属性< / p > < / li >
< li > < p > < a class = "reference internal" href = "ognl.html" > < span class = "doc" > ognl< / span > < / a > ——执行ognl表达式< / p > < / li >
< li > < p > < a class = "reference internal" href = "mbean.html" > < span class = "doc" > mbean< / span > < / a > ——查看 Mbean 的信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "heapdump.html" > < span class = "doc" > heapdump< / span > < / a > ——dump java heap, 类似jmap命令的heap dump功能< / p > < / li >
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< div class = "section" id = "class-classloader" >
< h2 > class/classloader相关< a class = "headerlink" href = "#class-classloader" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > < a class = "reference internal" href = "sc.html" > < span class = "doc" > sc< / span > < / a > ——查看JVM已加载的类信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "sm.html" > < span class = "doc" > sm< / span > < / a > ——查看已加载类的方法信息< / p > < / li >
< li > < p > < a class = "reference internal" href = "jad.html" > < span class = "doc" > jad< / span > < / a > ——反编译指定已加载类的源码< / p > < / li >
< li > < p > < a class = "reference internal" href = "mc.html" > < span class = "doc" > mc< / span > < / a > ——内存编译器，内存编译< code class = "docutils literal notranslate" > < span class = "pre" > .java< / span > < / code > 文件为< code class = "docutils literal notranslate" > < span class = "pre" > .class< / span > < / code > 文件< / p > < / li >
< li > < p > < a class = "reference internal" href = "redefine.html" > < span class = "doc" > redefine< / span > < / a > ——加载外部的< code class = "docutils literal notranslate" > < span class = "pre" > .class< / span > < / code > 文件， < / p > < / li >
< li > < p > < a class = "reference internal" href = "dump.html" > < span class = "doc" > dump< / span > < / a > ——dump 已加载类的 byte code 到特定目录< / p > < / li >
< li > < p > < a class = "reference internal" href = "classloader.html" > < span class = "doc" > classloader< / span > < / a > ——查看classloader的继承树， ， ， < / p > < / li >
< / ul >
< / div >
< div class = "section" id = "monitor-watch-trace" >
< h2 > monitor/watch/trace相关< a class = "headerlink" href = "#monitor-watch-trace" title = "永久链接至标题" > ¶< / a > < / h2 >
< blockquote >
< div > < p > 请注意，这些命令，都通过字节码增强技术来实现的，会在指定类的方法中插入一些切面来实现数据统计和观测，因此在线上、预发使用时，请尽量明确需要观测的类、方法以及条件，诊断结束要执行 < code class = "docutils literal notranslate" > < span class = "pre" > stop< / span > < / code > 或将增强过的类执行 < code class = "docutils literal notranslate" > < span class = "pre" > reset< / span > < / code > 命令。< / p >
< / div > < / blockquote >
< ul class = "simple" >
< li > < p > < a class = "reference internal" href = "monitor.html" > < span class = "doc" > monitor< / span > < / a > ——方法执行监控< / p > < / li >
< li > < p > < a class = "reference internal" href = "watch.html" > < span class = "doc" > watch< / span > < / a > ——方法执行数据观测< / p > < / li >
< li > < p > < a class = "reference internal" href = "trace.html" > < span class = "doc" > trace< / span > < / a > ——方法内部调用路径，并输出方法路径上的每个节点上耗时< / p > < / li >
< li > < p > < a class = "reference internal" href = "stack.html" > < span class = "doc" > stack< / span > < / a > ——输出当前方法被调用的调用路径< / p > < / li >
< li > < p > < a class = "reference internal" href = "tt.html" > < span class = "doc" > tt< / span > < / a > ——方法执行数据的时空隧道，记录下指定方法每次调用的入参和返回信息，并能对这些不同的时间下调用进行观测< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "profiler" >
< h2 > profiler/火焰图< a class = "headerlink" href = "#profiler" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > < a class = "reference internal" href = "profiler.html" > < span class = "doc" > profiler< / span > < / a > –使用< a class = "reference external" href = "https://github.com/jvm-profiling-tools/async-profiler" > async-profiler< / a > 对应用采样，生成火焰图< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "options" >
< h2 > options< a class = "headerlink" href = "#options" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > < a class = "reference internal" href = "options.html" > < span class = "doc" > options< / span > < / a > ——查看或设置Arthas全局开关< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "id3" >
< h2 > 管道< a class = "headerlink" href = "#id3" title = "永久链接至标题" > ¶< / a > < / h2 >
< p > Arthas支持使用管道对上述命令的结果进行进一步的处理， < code class = "docutils literal notranslate" > < span class = "pre" > sm< / span > < span class = "pre" > java.lang.String< / span > < span class = "pre" > *< / span > < span class = "pre" > |< / span > < span class = "pre" > grep< / span > < span class = "pre" > 'index'< / span > < / code > < / p >
< ul class = "simple" >
< li > < p > grep——搜索满足条件的< / p > < / li >
< li > < p > plaintext——将< / p > < / li >
< li > < p > wc——按行统计输出结果< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "id4" >
< h2 > 后台异步任务< a class = "headerlink" href = "#id4" title = "永久链接至标题" > ¶< / a > < / h2 >
< p > 当线上出现偶发的问题， ， ， ， < a class = "reference internal" href = "async.html" > < span class = "doc" > 这里< / span > < / a > < / p >
< ul class = "simple" >
< li > < p > 使用 > 将结果重写向到日志文件，使用 & 指定命令是后台运行， （ ） < / p > < / li >
< li > < p > jobs——列出所有job< / p > < / li >
< li > < p > kill——强制终止任务< / p > < / li >
< li > < p > fg——将暂停的任务拉到前台执行< / p > < / li >
< li > < p > bg——将暂停的任务放到后台执行< / p > < / li >
< / ul >
< / div >
< div class = "section" id = "web-console" >
< h2 > Web Console< a class = "headerlink" href = "#web-console" title = "永久链接至标题" > ¶< / a > < / h2 >
< p > 通过websocket连接Arthas。< / p >
< div class = "toctree-wrapper compound" >
< ul >
< li class = "toctree-l1" > < a class = "reference internal" href = "web-console.html" > Web Console< / a > < / li >
< / ul >
< / div >
< / div >
< div class = "section" id = "java-agent" >
< h2 > 以java agent方式启动< a class = "headerlink" href = "#java-agent" title = "永久链接至标题" > ¶< / a > < / h2 >
< div class = "toctree-wrapper compound" >
< ul >
< li class = "toctree-l1" > < a class = "reference internal" href = "agent.html" > 以java agent方式启动< / a > < / li >
< / ul >
< / div >
< / div >
< div class = "section" id = "as-sh-arthas-boot" >
< h2 > as.sh 和 arthas-boot 技巧< a class = "headerlink" href = "#as-sh-arthas-boot" title = "永久链接至标题" > ¶< / a > < / h2 >
< ul class = "simple" >
< li > < p > 通过< code class = "docutils literal notranslate" > < span class = "pre" > select< / span > < / code > 功能选择attach的进程。< / p > < / li >
< / ul >
< p > 正常情况下，每次执行< code class = "docutils literal notranslate" > < span class = "pre" > as.sh< / span > < / code > /< code class = "docutils literal notranslate" > < span class = "pre" > arthas-boot.jar< / span > < / code > 需要选择， ， ， < / p >
< p > 比如，已经启动了< code class = "docutils literal notranslate" > < span class = "pre" > arthas-demo.jar< / span > < / code > ，使用< code class = "docutils literal notranslate" > < span class = "pre" > jps< / span > < / code > 命令查看：< / p >
< div class = "highlight-bash notranslate" > < div class = "highlight hljs" > < pre class = "bash" > $ jps
58883 arthas-demo.jar
58884 Jps< / pre > < / div >
< / div >
< p > 通过< code class = "docutils literal notranslate" > < span class = "pre" > select< / span > < / code > 参数可以指定进程名字，非常方便。< / p >
< div class = "highlight-bash notranslate" > < div class = "highlight hljs" > < pre class = "bash" > $ ./as.sh --select arthas-demo
Arthas script version: 3.3.6
[INFO] JAVA_HOME: /tmp/java/8.0.222-zulu
Arthas home: /Users/admin/.arthas/lib/3.3.6/arthas
Calculating attach execution time...
Attaching to 59161 using version /Users/admin/.arthas/lib/3.3.6/arthas...
real 0m0.572s
user 0m0.281s
sys 0m0.039s
Attach success.
telnet connecting to arthas server... current timestamp is 1594280799
Trying 127.0.0.1...
Connected to localhost.
Escape character is ' ^]' .
,---. ,------. ,--------.,--. ,--. ,---. ,---.
/ O \ | .--. ' ' --. .--' | ' --' | / O \ ' .-'
| .-. || ' --' .' | | | .--. || .-. |`. `-.
| | | || |\ \ | | | | | || | | |.-' |
`--' `--' `--' ' --' `--' `--' `--' `--' `--' `-----'
wiki https://alibaba.github.io/arthas
tutorials https://alibaba.github.io/arthas/arthas-tutorials
version 3.3.6
pid 58883< / pre > < / div >
< / div >
< / div >
< div class = "section" id = "id5" >
< h2 > 用户数据回报< a class = "headerlink" href = "#id5" title = "永久链接至标题" > ¶< / a > < / h2 >
< p > 在< code class = "docutils literal notranslate" > < span class = "pre" > 3.1.4< / span > < / code > 版本后，增加了用户数据回报功能，方便统一做安全或者历史数据统计。< / p >
< p > 在启动时，指定< code class = "docutils literal notranslate" > < span class = "pre" > stat-url< / span > < / code > ，就会回报执行的每一行命令，比如： < code class = "docutils literal notranslate" > < span class = "pre" > ./as.sh< / span > < span class = "pre" > --stat-url< / span > < span class = "pre" > 'http://192.168.10.11:8080/api/stat'< / span > < / code > < / p >
< p > 在tunnel server里有一个示例的回报代码， < / p >
< p > < a class = "reference external" href = "https://github.com/alibaba/arthas/blob/master/tunnel-server/src/main/java/com/alibaba/arthas/tunnel/server/app/web/StatController.java" > StatController.java< / a > < / p >
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< h2 > 其他特性< a class = "headerlink" href = "#id6" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li class = "toctree-l1" > < a class = "reference external" href = "https://github.com/alibaba/arthas/issues/11" > ognl表达式的用法说明< / a > < / li >
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