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<div id="app"><!--[--><div class="theme-container"><!--[--><header class="navbar"><div class="toggle-sidebar-button" title="切换侧边栏" aria-expanded="false" role="button" tabindex="0"><div class="icon" aria-hidden="true"><span></span><span></span><span></span></div></div><span><a href="/3.x/" class="" data-v-a8869d06><!----><span class="site-name can-hide" data-v-a8869d06>arthas</span><span class="navbar-version" data-v-a8869d06>v3.7.3</span></a></span><div class="navbar-items-wrapper" style=""><!--[--><!--]--><nav class="navbar-items can-hide"><!--[--><div class="navbar-item"><a href="/3.x/" class="" aria-label="首页"><!--[--><!--]--> 首页 <!--[--><!--]--></a></div><div class="navbar-item"><a class="external-link" href="/doc/arthas-tutorials.html?language=cn&id=arthas-basics" rel="noopener noreferrer" target="_blank" aria-label="在线教程"><!--[--><!--]--><span>在线教程</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 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></div><div class="navbar-item"><a href="/3.x/doc/" class="router-link-active" aria-label="文档"><!--[--><!--]--> 文档 <!--[--><!--]--></a></div><div class="navbar-item"><a href="/3.x/doc/commands.md" class="" aria-label="命令列表"><!--[--><!--]--> 命令列表 <!--[--><!--]--></a></div><div class="navbar-item"><a href="/3.x/doc/download.md" class="" aria-label="下载"><!--[--><!--]--> 下载 <!--[--><!--]--></a></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="版本"><span class="title">版本</span><span class="arrow down"></span></button><button class="navbar-dropdown-title-mobile" type="button" aria-label="版本"><span class="title">版本</span><span class="right arrow"></span></button><ul style="display:none;" class="navbar-dropdown"><!--[--><li class="navbar-dropdown-item"><a class="external-link" href="https://arthas.aliyun.com/" rel="noopener noreferrer" target="_blank" aria-label="v4.x"><!--[--><!--]--><span>v4.x</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 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><!--]--></ul></div></div><div class="navbar-item"><div class="navbar-dropdown-wrapper"><button class="navbar-dropdown-title" type="button" aria-label="Select language"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="1em" height="1em" style="height:1.25rem;width:1.25rem;vertical-align:bottom;" viewbox="0 0 24 24"><path fill="currentColor" d="M13.35 22q-.6 0-.862-.387q-.263-.388-.063-.963l3.65-9.675q.15-.4.563-.688Q17.05 10 17.5 10q.425 0 .85.287q.425.288.575.688l3.65 9.675q.2.575-.062.963q-.263.387-.888.387q-.275 0-.5-.175q-.225-.175-.325-.425l-.85-2.45H15.1l-.875 2.45q-.1.25-.35.425q-.25.175-.525.175Zm2.35-4.8h3.6l-1.75-4.95h-.1ZM7.15 8.55q.4.725.85 1.337q.45.613 1.05 1.263q1.1-1.2 1.825-2.462Q11.6 7.425 12.1 6H2q-.425 0-.712-.287Q1 5.425 1 5t.288-.713Q1.575 4 2 4h6V3q0-.425.288-.713Q8.575 2 9 2t.713.287Q10 2.575 10 3v1h6q.425 0 .712.287Q17 4.575 17 5t-.288.713Q16.425 6 16 6h-1.9q-.525 1.775-1.425 3.45q-.9 1.675-2.225 3.15l2.4 2.45l-.75 2.05L9 14l-4.3 4.3q-.27
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ID NAME GROUP PRIORITY STATE %CPU DELTA_TIME TIME INTERRUPTE DAEMON
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-1 C2 CompilerThread0 - -1 - 1.55 0.077 0:8.684 false true
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53 Timer-for-arthas-dashboard-07b system 5 RUNNABLE 0.08 0.004 0:0.004 false true
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22 scheduling-1 main 5 TIMED_WAI 0.06 0.003 0:0.287 false false
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-1 C1 CompilerThread0 - -1 - 0.06 0.003 0:2.171 false true
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-1 VM Periodic Task Thread - -1 - 0.03 0.001 0:0.092 false true
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49 arthas-NettyHttpTelnetBootstra system 5 RUNNABLE 0.02 0.001 0:0.156 false true
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16 Catalina-utility-1 main 1 TIMED_WAI 0.0 0.000 0:0.029 false false
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-1 G1 Young RemSet Sampling - -1 - 0.0 0.000 0:0.019 false true
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17 Catalina-utility-2 main 1 WAITING 0.0 0.000 0:0.025 false false
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34 http-nio-8080-ClientPoller main 5 RUNNABLE 0.0 0.000 0:0.016 false true
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23 http-nio-8080-BlockPoller main 5 RUNNABLE 0.0 0.000 0:0.011 false true
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-1 VM Thread - -1 - 0.0 0.000 0:0.032 false true
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-1 Service Thread - -1 - 0.0 0.000 0:0.006 false true
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-1 GC Thread#5 - -1 - 0.0 0.000 0:0.043 false true
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Memory used total max usage GC
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heap 36M 70M 4096M 0.90% gc.g1_young_generation.count 12
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g1_eden_space 6M 18M -1 33.33% 86
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g1_old_gen 30M 50M 4096M 0.74% gc.g1_old_generation.count 0
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g1_survivor_space 491K 2048K -1 24.01% gc.g1_old_generation.time(ms) 0
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nonheap 66M 69M -1 96.56%
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codeheap_'non-nmethods' 1M 2M 5M 22.39%
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metaspace 46M 47M -1 98.01%
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Runtime
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os.name Mac OS X
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os.version 10.15.4
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java.version 15
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java.home /Library/Java/JavaVirtualMachines/jdk-15.jdk/Contents/Home
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systemload.average 10.68
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processors 8
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uptime 272s
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="数据说明" tabindex="-1"><a class="header-anchor" href="#数据说明" aria-hidden="true">#</a> 数据说明</h2><ul><li>ID: Java 级别的线程 ID，注意这个 ID 不能跟 jstack 中的 nativeID 一一对应。</li><li>NAME: 线程名</li><li>GROUP: 线程组名</li><li>PRIORITY: 线程优先级, 1~10 之间的数字，越大表示优先级越高</li><li>STATE: 线程的状态</li><li>CPU%: 线程的 cpu 使用率。比如采样间隔 1000ms，某个线程的增量 cpu 时间为 100ms，则 cpu 使用率=100/1000=10%</li><li>DELTA_TIME: 上次采样之后线程运行增量 CPU 时间，数据格式为<code>秒</code></li><li>TIME: 线程运行总 CPU 时间，数据格式为<code>分:秒</code></li><li>INTERRUPTED: 线程当前的中断位状态</li><li>DAEMON: 是否是 daemon 线程</li></ul><h3 id="jvm-内部线程" tabindex="-1"><a class="header-anchor" href="#jvm-内部线程" aria-hidden="true">#</a> JVM 内部线程</h3><p>Java 8 之后支持获取 JVM 内部线程 CPU 时间，这些线程只有名称和 CPU 时间，没有 ID 及状态等信息（显示 ID 为-1）。 通过内部线程可以观测到 JVM 活动，如 GC、JIT 编译等占用 CPU 情况，方便了解 JVM 整体运行状况。</p><ul><li>当 JVM 堆(heap)/元数据(metaspace)空间不足或 OOM 时，可以看到 GC 线程的 CPU 占用率明显高于其他的线程。</li><li>当执行<code>trace/watch/tt/redefine</code>等命令后，可以看到 JIT 线程活动变得更频繁。因为 JVM 热更新 class 字节码时清除了此 class 相关的 JIT 编译结果，需要重新编译。</li></ul><p>JVM 内部线程包括下面几种：</p><ul><li>JIT 编译线程: 如 <code>C1 CompilerThread0</code>, <code>C2 CompilerThread0</code></li><li>GC 线程: 如<code>GC Thread0</code>, <code>G1 Young RemSet Sampling</code></li><li>其它内部线程: 如<code>VM Periodic Task Thread</code>, <code>VM Thread</code>, <code>Service Thread</code></li></ul><h2 id="截图展示" tabindex="-1"><a class="header-anchor" href="#截图展示" aria-hidden="true">#</a> 截图展示</h2><p><img src="/3.x/images/dashboard.png" alt="" title="dashboard"></p></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-fdd717e0><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/doc/dashboard.md" rel="noopener noreferrer" target="_blank" aria-label="在 GitHub 上编辑此页"><!--[--><!--]--><span>在 GitHub 上编辑此页</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 62.8,22.9 71.5,22.9"></polygon></svg><span class="external
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