</script><metaname="aes-config"content="pid=xux-opensource&user_type=101&uid=&username=&dim10=arthas"><scriptsrc="//g.alicdn.com/alilog/mlog/aplus_v2.js"id="beacon-aplus"exparams="clog=o&aplus&sidx=aplusSidx&ckx=aplusCkx"></script><scriptsrc="//g.alicdn.com/aes/??tracker/1.0.34/index.js,tracker-plugin-pv/2.4.5/index.js,tracker-plugin-event/1.2.5/index.js,tracker-plugin-jserror/1.0.13/index.js,tracker-plugin-api/1.1.14/index.js,tracker-plugin-perf/1.1.8/index.js,tracker-plugin-eventTiming/1.0.4/index.js"></script><title>dashboard | arthas</title><metaname="description"content="arthas user document">
</code></pre><divclass="line-numbers"aria-hidden="true"><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div><divclass="line-number"></div></div></div><h2id="notes-on-column-headers"tabindex="-1"><aclass="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><h3id="jvm-internal-threads"tabindex="-1"><aclass="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><h2id="screenshot"tabindex="-1"><aclass="header-anchor"href="#screenshot"aria-hidden="true">#</a> Screenshot</h2><p><imgsrc="/images/dashboard.png"alt=""title="dashboard"></p></div><!--[--><!--]--></div><footerclass="page-meta right-menu-padding"data-v-fdd717e0><divclass="meta-item edit-link"><aclass="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><svgclass="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"><pathfill="currentColor"d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c
