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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 href="/doc/contact-us.md" class="sidebar-item" aria-label="QQ群/钉钉群"><!--[--><!--]--> QQ群/钉钉群 <!--[--><!--]--></a><!----></li><!--]--></ul></li><!--]--></ul><!--[--><!--]--></aside><!--]--><!--[--><main class="page" data-v-8e2a76de><!--[--><!--]--><div class="right-menu-padding theme-default-content" data-v-8e2a76de><!--[--><!--]--><div class="right-menu-wrapper" data-v-8e2a76de data-v-7789db5c><div class="right-menu-margin" data-v-7789db5c><div class="right-menu-title" data-v-7789db5c>目录</div><div class="right-menu-content" data-v-7789db5c><!--[--><!--]--></div></div></div><div data-v-8e2a76de><h1 id="perfcounter" tabindex="-1"><a class="header-anchor" href="#perfcounter" aria-hidden="true">#</a> perfcounter</h1><p><a href="https://arthas.aliyun.com/doc/arthas-tutorials.html?language=cn&id=command-perfcounter" target="_blank" rel="noopener noreferrer"><code>perfcounter</code>在线教程<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></p><div class="custom-container tip"><p class="custom-container-title">提示</p><p>查看当前 JVM 的 Perf Counter 信息</p></div><h2 id="使用参考" tabindex="-1"><a class="header-anchor" href="#使用参考" aria-hidden="true">#</a> 使用参考</h2><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ perfcounter
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java.ci.totalTime 2325637411
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java.cls.loadedClasses 3403
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java.cls.sharedLoadedClasses 0
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java.cls.sharedUnloadedClasses 0
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java.cls.unloadedClasses 0
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java.property.java.version 11.0.4
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java.property.java.vm.info mixed mode
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java.property.java.vm.name OpenJDK 64-Bit Server VM
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...
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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></div><p>可以用<code>-d</code>参数打印更多信息：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>$ perfcounter -d
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Name Variability Units Value
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---------------------------------------------------------------------------------
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java.ci.totalTime Monotonic Ticks 3242526906
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java.cls.loadedClasses Monotonic Events 3404
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java.cls.sharedLoadedClasses Monotonic Events 0
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java.cls.sharedUnloadedClasses Monotonic Events 0
|
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java.cls.unloadedClasses Monotonic Events 0
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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></div><h2 id="jdk9-以上的应用" tabindex="-1"><a class="header-anchor" href="#jdk9-以上的应用" aria-hidden="true">#</a> jdk9 以上的应用</h2><p>如果没有打印出信息，应用在启动时，加下面的参数：</p><div class="language-text ext-text line-numbers-mode"><pre class="language-text"><code>--add-opens java.base/jdk.internal.perf=ALL-UNNAMED --add-exports java.base/jdk.internal.perf=ALL-UNNAMED
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div></div><!--[--><!--]--></div><footer class="page-meta right-menu-padding" data-v-8e2a76de><div class="meta-item edit-link"><a class="external-link meta-item-label" href="https://github.com/alibaba/arthas/edit/master/site/docs/doc/perfcounter.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-link-icon-sr-only">在新窗口打开</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">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: hollowman186@vip.qq.com">Hollow Man</span><!----><!--]--><!--]--></span></div></footer><nav class="page-nav right-menu-padding" data-v-8e2a76de><p class="inner"><span class="prev"><a href="/doc/ognl.html" class="" aria-label="ognl"><!--[--><!--]--> ognl <!--[--><!--]--></a></span><span class="next"><a href="/doc/sysenv.html" class="" aria-label="sysenv"><!--[--><!--]--> sysenv <!--[--><!--]--></a></span></p></nav><!--[--><!--]--></main><!--]--></div><!----><!--]--></div>
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