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< span id = "id1" > < / span > < h1 > 进阶使用< a class = "headerlink" href = "#" title = "永久链接至标题" > ¶< / a > < / h1 >
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< span id = "id2" > < / span > < h2 > 基础命令< a class = "headerlink" href = "#" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li > help——查看命令帮助信息< / li >
< li > cls——清空当前屏幕区域< / li >
< li > session——查看当前会话的信息< / li >
< li > < 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， < / li >
< li > version——输出当前目标 Java 进程所加载的 Arthas 版本号< / li >
< li > quit——退出当前 Arthas 客户端，其他 Arthas 客户端不受影响< / li >
< li > shutdown——关闭 Arthas 服务端，所有 Arthas 客户端全部退出< / li >
< li > < 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< / li >
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< span id = "jvm" > < / span > < h2 > jvm相关< a class = "headerlink" href = "#jvm" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li > < 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< / li >
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< span id = "class-classloader" > < / span > < h2 > class/classloader相关< a class = "headerlink" href = "#class-classloader" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li > < a class = "reference internal" href = "sc.html" > < span class = "doc" > sc< / span > < / a > ——查看JVM已加载的类信息< / li >
< li > < a class = "reference internal" href = "sm.html" > < span class = "doc" > sm< / span > < / a > ——查看已加载类的方法信息< / li >
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< span id = "monitor-watch-trace" > < / span > < 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 > 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" > shutdown< / span > < / code > 或将增强过的类执行 < code class = "docutils literal notranslate" > < span class = "pre" > reset< / span > < / code > 命令。< / div > < / blockquote >
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< li > < a class = "reference internal" href = "monitor.html" > < span class = "doc" > monitor< / span > < / a > ——方法执行监控< / li >
< li > < a class = "reference internal" href = "watch.html" > < span class = "doc" > watch< / span > < / a > ——方法执行数据观测< / li >
< li > < 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< / li >
< li > < 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< / li >
< li > < 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< / li >
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< span id = "options" > < / span > < h2 > options< a class = "headerlink" href = "#options" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li > < a class = "reference internal" href = "options.html" > < span class = "doc" > options< / span > < / a > ——查看或设置Arthas全局开关< / li >
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< span id = "id3" > < / span > < h2 > 管道< a class = "headerlink" href = "#" 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" > org.apache.log4j.Logger< / span > < span class = "pre" > |< / span > < span class = "pre" > grep< / span > < span class = "pre" > < init> < / span > < / code > < / p >
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< li > grep——搜索满足条件的< / li >
< li > plaintext——将< / li >
< li > wc——按行统计输出结果< / li >
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< span id = "id4" > < / span > < h2 > 后台异步任务< a class = "headerlink" href = "#" 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 >
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< li > 使用 > 将结果重写向到日志文件，使用 & 指定命令是后台运行， （ ） < / li >
< li > jobs——列出所有job< / li >
< li > kill——强制终止任务< / li >
< li > fg——将暂停的任务拉到前台执行< / li >
< li > bg——将暂停的任务放到后台执行< / li >
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< span id = "id5" > < / span > < h2 > 其他特性< a class = "headerlink" href = "#" title = "永久链接至标题" > ¶< / a > < / h2 >
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< li class = "toctree-l1" > < a class = "reference internal" href = "batch-support.html" > 批处理的支持< / a > < / li >
< 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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