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outputs"><!--[--><!--]--> Log command outputs <!--[--><!--]--></a><!----></li><li><a href="/en/doc/batch-support.html" class="sidebar-item" aria-label="Batch Processing"><!--[--><!--]--> Batch Processing <!--[--><!--]--></a><!----></li><li><p tabindex="0" class="sidebar-item">How to use ognl <!----></p><ul style="" class="sidebar-item-children"><!--[--><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues/11" rel="noopener noreferrer" target="_blank" aria-label="Basic ognl example"><!--[--><!--]--><span>Basic ognl example</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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aria-label="mbean"><!--[--><!--]--> mbean <!--[--><!--]--></a><!----></li><li><a href="/en/doc/memory.html" class="sidebar-item" aria-label="memory"><!--[--><!--]--> memory <!--[--><!--]--></a><!----></li><li><a href="/en/doc/ognl.html" class="sidebar-item" aria-label="ognl"><!--[--><!--]--> ognl <!--[--><!--]--></a><!----></li><li><a href="/en/doc/perfcounter.html" class="sidebar-item" aria-label="perfcounter"><!--[--><!--]--> perfcounter <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sysenv.html" class="sidebar-item" aria-label="sysenv"><!--[--><!--]--> sysenv <!--[--><!--]--></a><!----></li><li><a href="/en/doc/sysprop.html" class="sidebar-item" aria-label="sysprop"><!--[--><!--]--> sysprop <!--[--><!--]--></a><!----></li><li><a href="/en/doc/thread.html" class="sidebar-item" aria-label="thread"><!--[--><!--]--> thread <!--[--><!--]--></a><!----></li><li><a href="/en/doc/vmoption.html" class="sidebar-item" aria-label="vmoption"><!--[--><!--]--> vmoption 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data-v-2b64a081><div class="right-menu-margin" data-v-2b64a081><div class="right-menu-title" data-v-2b64a081>Table of Contents</div><div class="right-menu-content" data-v-2b64a081><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h1 id="dashboard" tabindex="-1"><a class="header-anchor" href="#dashboard" aria-hidden="true">#</a> dashboard</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=en&id=command-dashboard" target="_blank" rel="noopener noreferrer"><code>dashboard</code> online tutorial<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">open in new window</span></span></a></p><div class="custom-container tip"><p class="custom-container-title">TIP</p><p>This is the real time statistics dashboard for the current system, press <code>Ctrl+C</code> to exit.</p></div><p>When running in Apache Tomcat Alibaba edition, the dashboard will also present the real time statistics of the tomcat, including <a href="https://en.wikipedia.org/wiki/Queries_per_second" target="_blank" rel="noopener noreferrer">QPS<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">open in new window</span></span></a>, RT, error counts, and thread pool, etc.</p><h2 id="options" tabindex="-1"><a class="header-anchor" href="#options" aria-hidden="true">#</a> Options</h2><table><thead><tr><th style="text-align:right;">Name</th><th style="text-align:left;">Specification</th></tr></thead><tbody><tr><td style="text-align:right;">[i:]</td><td style="text-align:left;">The interval (in ms) between two executions, default is 5000 ms.</td></tr><tr><td style="text-align:right;">[n:]</td><td style="text-align:left;">The number of times this command will be executed.</td></tr></tbody></table><h2 id="usage" tabindex="-1"><a class="header-anchor" href="#usage" aria-hidden="true">#</a> Usage</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ dashboard
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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="notes-on-column-headers" tabindex="-1"><a class="header-anchor" href="#notes-on-column-headers" aria-hidden="true">#</a> Notes on column headers</h2><ul><li>ID: JVM thread ID, pls. note this ID is different from the nativeID in jstack</li><li>NAME: thread name</li><li>GROUP: thread group name</li><li>PRIORITY: thread priority, ranged from 1 to 10. The greater number, the higher priority</li><li>STATE: thread state</li><li>CPU%: the ratio of CPU usage for the thread. For example, the sampling interval is 1000ms, and the incremental cpu time of a thread is 100ms, then the cpu usage rate=100/1000=10%</li><li>DELTA_TIME: incremental CPU time of thread running after the last sampling in <code>second</code> format</li><li>TIME: total CPU time of the thread in <code>minute:second</code> format</li><li>INTERRUPTED: the thread interruption state</li><li>DAEMON: daemon thread or not</li></ul><h3 id="jvm-internal-threads" tabindex="-1"><a class="header-anchor" href="#jvm-internal-threads" aria-hidden="true">#</a> JVM internal threads</h3><p>After Java 8, it is supported to obtain the CPU time of JVM internal threads. These threads only have the name and CPU time, without ID and status information (display ID is -1).</p><p>JVM activities can be observed through internal threads, such as GC, JIT compilation, etc., to perceive the overall status of JVM.</p><ul><li>When the JVM heap/metaspace space is insufficient or OOM, it can be seen that the CPU usage of the GC threads is significantly higher than other threads.</li><li>After executing commands such as <code>trace/watch/tt/redefine</code>, you can see that JIT threads activities become more frequent. Because the JIT compilation data related to this class is cleared when the JVM hot update the class bytecode, it needs to be recompiled.</li></ul><p>JVM internal threads include the following:</p><ul><li>JIT compilation thread: such as <code>C1 CompilerThread0</code>, <code>C2 CompilerThread0</code></li><li>GC thread: such as <code>GC Thread0</code>, <code>G1 Young RemSet Sampling</code></li><li>Other internal threads: such as<code>VM Periodic Task Thread</code>, <code>VM Thread</code>, <code>Service Thread</code></li></ul><h2 id="screenshot" tabindex="-1"><a class="header-anchor" href="#screenshot" aria-hidden="true">#</a> Screenshot</h2><p><img src="/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/en/doc/dashboard.md" rel="noopener noreferrer" target="_blank" aria-label="Edit this page on GitHub"><!--[--><!--]--><span>Edit this page on GitHub</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">open in new window</span></span><!--[--><!--]--></a></div><div class="meta-item last-updated"><span class="meta-item-label">Last Updated: </span><!----></div><div class="meta-item contributors"><span class="meta-item-label">Contributors: </span><span class="meta-item-info"><!--[--><!--[--><span class="contributor" title="email: hengyunabc@gmail.com">hengyunabc</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: lhearen@gmail.com">LHearen</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: i@fatpandac.com">Fatpandac</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: hollowman186@vip.qq.com">Hollow Man</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: ian.luo@gmail.com">beiwei30</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: kylixs@qq.com">gongdewei</span><!--[-->, <!--]--><!--]--><!--[--><span class="contributor" title="email: xuefeng0707@hotmail.com">xuefeng0707</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav right-menu-padding" data-v-fdd717e0><p class="inner"><!----><span class="next"><a href="/en/doc/getstatic.html" class="" aria-label="getstatic"><!--[--><!--]--> getstatic <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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