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d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span><!--[--><!--]--></a><!----></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/releases" rel="noopener noreferrer" target="_blank" aria-label="Release Notes"><!--[--><!--]--><span>Release Notes</span><span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 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class="">getstatic</a> - 查看类的静态属性</li><li><a href="/doc/heapdump.html" class="">heapdump</a> - dump java heap, 类似 jmap 命令的 heap dump 功能</li><li><a href="/doc/jvm.html" class="">jvm</a> - 查看当前 JVM 的信息</li><li><a href="/doc/logger.html" class="">logger</a> - 查看和修改 logger</li><li><a href="/doc/mbean.html" class="">mbean</a> - 查看 Mbean 的信息</li><li><a href="/doc/memory.html" class="">memory</a> - 查看 JVM 的内存信息</li><li><a href="/doc/ognl.html" class="">ognl</a> - 执行 ognl 表达式</li><li><a href="/doc/perfcounter.html" class="">perfcounter</a> - 查看当前 JVM 的 Perf Counter 信息</li><li><a href="/doc/sysenv.html" class="">sysenv</a> - 查看 JVM 的环境变量</li><li><a href="/doc/sysprop.html" class="">sysprop</a> - 查看和修改 JVM 的系统属性</li><li><a href="/doc/thread.html" class="">thread</a> - 查看当前 JVM 的线程堆栈信息</li><li><a href="/doc/vmoption.html" class="">vmoption</a> - 查看和修改 JVM 里诊断相关的 option</li><li><a href="/doc/vmtool.html" class="">vmtool</a> - 从 jvm 里查询对象，执行 forceGc</li></ul><h2 id="class-classloader-相关" tabindex="-1"><a class="header-anchor" href="#class-classloader-相关" aria-hidden="true">#</a> class/classloader 相关</h2><ul><li><a href="/doc/classloader.html" class="">classloader</a> - 查看 classloader 的继承树，urls，类加载信息，使用 classloader 去 getResource</li><li><a href="/doc/dump.html" class="">dump</a> - dump 已加载类的 byte code 到特定目录</li><li><a href="/doc/jad.html" class="">jad</a> - 反编译指定已加载类的源码</li><li><a href="/doc/mc.html" class="">mc</a> - 内存编译器，内存编译<code>.java</code>文件为<code>.class</code>文件</li><li><a href="/doc/redefine.html" class="">redefine</a> - 加载外部的<code>.class</code>文件，redefine 到 JVM 里</li><li><a href="/doc/retransform.html" class="">retransform</a> - 加载外部的<code>.class</code>文件，retransform 到 JVM 里</li><li><a href="/doc/sc.html" class="">sc</a> - 查看 JVM 已加载的类信息</li><li><a href="/doc/sm.html" class="">sm</a> - 查看已加载类的方法信息</li></ul><h2 id="monitor-watch-trace-相关" tabindex="-1"><a class="header-anchor" href="#monitor-watch-trace-相关" aria-hidden="true">#</a> monitor/watch/trace 相关</h2><div class="custom-container warning"><p class="custom-container-title">注意</p><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>stop</code> 或将增强过的类执行 <code>reset</code> 命令。</p></div><ul><li><a href="/doc/monitor.html" class="">monitor</a> - 方法执行监控</li><li><a href="/doc/stack.html" class="">stack</a> - 输出当前方法被调用的调用路径</li><li><a href="/doc/trace.html" class="">trace</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 href="/doc/tt.html" class="">tt</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><li><a href="/doc/watch.html" class="">watch</a> - 方法执行数据观测</li></ul><h2 id="profiler-火焰图" tabindex="-1"><a class="header-anchor" href="#profiler-火焰图" aria-hidden="true">#</a> profiler/火焰图</h2><ul><li><a href="/doc/profiler.html" class="">profiler</a> - 使用<a href="https://github.com/jvm-profiling-tools/async-profiler" target="_blank" rel="noopener noreferrer">async-profiler<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewbox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">在新窗口打开</span></span></a>对应用采样，生成火焰图</li></ul><h2 id="鉴权" tabindex="-1"><a class="header-anchor" href="#鉴权" aria-hidden="true">#</a> 鉴权</h2><ul><li><a href="/doc/auth.html" class="">auth</a> - 鉴权</li></ul><h2 id="options" tabindex="-1"><a class="header-anchor" href="#options" aria-hidden="true">#</a> options</h2><ul><li><a href="/doc/options.html" class="">options</a> - 查看或设置 Arthas 全局开关</li></ul><h2 id="管道" tabindex="-1"><a class="header-anchor" href="#管道" aria-hidden="true">#</a> 管道</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，如<code>sm java.lang.String * | grep 'index'</code></p><ul><li><a href="/doc/grep.html" class="">grep</a> - 搜索满足条件的结果</li><li>plaintext - 将命令的结果去除 ANSI 颜色</li><li>wc - 按行统计输出结果</li></ul><h2 id="后台异步任务" tabindex="-1"><a class="header-anchor" href="#后台异步任务" aria-hidden="true">#</a> 后台异步任务</h2><p>当线上出现偶发的问题，比如需要 watch 某个条件，而这个条件一天可能才会出现一次时，异步后台任务就派上用场了，详情请参考<a href="/doc/async.html" class="">这里</a></p><ul><li>使用 <code>></code> 将结果重写向到日志文件，使用 <code>&</code> 指定命令是后台运行，session 断开不影响任务执行（生命周期默认为 1 天）</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></ul><h2 id="基础命令" tabindex="-1"><a class="header-anchor" href="#基础命令" aria-hidden="true">#</a> 基础命令</h2><ul><li><a href="/doc/base64.html" class="">base64</a> - base64 编码转换，和 linux 里的 base64 命令类似</li><li><a href="/doc/cat.html" class="">cat</a> - 打印文件内容，和 linux 里的 cat 命令类似</li><li><a href="/doc/cls.html" class="">cls</a> - 清空当前屏幕区域</li><li><a href="/doc/echo.html" class="">echo</a> - 打印参数，和 linux 里的 echo 命令类似</li><li><a href="/doc/grep.html" class="">grep</a> - 匹配查找，和 linux 里的 grep 命令类似</li><li><a href="/doc/help.html" class="">help</a> - 查看命令帮助信息</li><li><a href="/doc/history.html" class="">history</a> - 打印命令历史</li><li><a href="/doc/keymap.html" class="">keymap</a> - Arthas 快捷键列表及自定义快捷键</li><li><a href="/doc/pwd.html" class="">pwd</a> - 返回当前的工作目录，和 linux 命令类似</li><li><a href="/doc/quit.html" class="">quit</a> - 退出当前 Arthas 客户端，其他 Arthas 客户端不受影响</li><li><a href="/doc/reset.html" class="">reset</a> - 重置增强类，将被 Arthas 增强过的类全部还原，Arthas 服务端关闭时会重置所有增强过的类</li><li><a href="/doc/session.html" class="">session</a> - 查看当前会话的信息</li><li><a href="/doc/stop.html" class="">stop</a> - 关闭 Arthas 服务端，所有 Arthas 客户端全部退出</li><li><a href="/doc/tee.html" class="">tee</a> - 复制标准输入到标准输出和指定的文件，和 linux 里的 tee 命令类似</li><li><a href="/doc/version.html" class="">version</a> - 输出当前目标 Java 进程所加载的 Arthas 版本号</li></ul></div><!--[--><!--]--></div><footer class="page-meta 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class="meta-item-label">贡献者: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: i@fatpandac.com">Fatpandac</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: dkafussss@gmail.com">Fu</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav right-menu-padding" data-v-e0e60120><p class="inner"><!----><span class="next"><a href="/doc/web-console.html" class="" aria-label="Web Console"><!--[--><!--]--> Web Console <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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