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<link rel="icon" href="/images/favicon.ico"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta property="og:title" content="Arthas"><meta property="og:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image" content="/images/arthas_mate_image.png"><meta property="og:description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta property="og:image:width" content="1200"><meta property="og:image:height" content="600"><meta property="twitter:image:src" content="/images/arthas_mate_image.png"><meta property="twitter:image:alt" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><meta itemprop="name" content="Arthas"><meta itemprop="image" content="/images/arthas_mate_image.png"><meta itemprop="description" content="Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas - alibaba/arthas: Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas"><script>
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</script><meta name="aes-config" content="pid=xux-opensource&user_type=101&uid=&username=&dim10=arthas"><script src="//g.alicdn.com/alilog/mlog/aplus_v2.js" id="beacon-aplus" exparams="clog=o&aplus&sidx=aplusSidx&ckx=aplusCkx"></script><script src="//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>arthas怎么分析cpu很高 | arthas</title><meta name="description" content="为了解决问题「arthas arthas怎么分析cpu很高」我们可以按照以下步骤利用Arthas进行分析### 1. 确保Arthas已准备就绪首先请确保您已经按照Arthas的[快速启动](#PF0vt)指南成功下载并安装了Arthas。如果您还未安装可以通过以下命令快速安装```bas">
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<!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history13512.html" class="sidebar-item" aria-label="如何查看java内存增长哪些对象"><!--[--><!--]--> 如何查看java内存增长哪些对象 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history15167.html" class="sidebar-item" aria-label="介绍一下arthas"><!--[--><!--]--> 介绍一下arthas <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history15738.html" class="sidebar-item" aria-label="arthas如何查看hashmap的值"><!--[--><!--]--> arthas如何查看hashmap的值 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history11451.html" class="sidebar-item" aria-label="arthas 怎么排查cpu占用过高"><!--[--><!--]--> arthas 怎么排查cpu占用过高 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history11809.html" class="sidebar-item" aria-label="linux下的arthas 具体怎么用?(使用教程)"><!--[--><!--]--> linux下的arthas 具体怎么用?(使用教程) <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history12741.html" 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<!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history13448.html" class="sidebar-item" aria-label="如何使用arthas分析慢查询"><!--[--><!--]--> 如何使用arthas分析慢查询 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history13522.html" class="sidebar-item" aria-label="Connect to telnet server error: 127.0.0.1 3658"><!--[--><!--]--> Connect to telnet server error: 127.0.0.1 3658 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history15726.html" class="sidebar-item" aria-label="arthas 如何查询static变量"><!--[--><!--]--> arthas 如何查询static变量 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history15740.html" class="sidebar-item" aria-label="arthas 分析内存身高的方法"><!--[--><!--]--> arthas 分析内存身高的方法 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history11453.html" class="sidebar-item" aria-label="arthas 怎样查看方法耗时"><!--[--><!--]--> arthas 怎样查看方法耗时 <!--[--><!--]--></a><!----></li><li><a 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artahs 怎么查看内存情况? <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history13506.html" class="sidebar-item" aria-label="如何查看java内存增长哪些对象"><!--[--><!--]--> 如何查看java内存增长哪些对象 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history14831.html" class="sidebar-item" aria-label="Dashboard 命令cpuUsage长期在90%左右"><!--[--><!--]--> Dashboard 命令cpuUsage长期在90%左右 <!--[--><!--]--></a><!----></li><li><a href="/doc/expert/user-question-history15729.html" class="sidebar-item" aria-label="arthas 怎么查看变量内容"><!--[--><!--]--> arthas 怎么查看变量内容 <!--[--><!--]--></a><!----></li><!--]--></ul></li><li><a class="external-link sidebar-item" href="https://github.com/alibaba/arthas/issues?q=label%3Auser-case" rel="noopener noreferrer" target="_blank" aria-label="用户案例"><!--[--><!--]--><span>用户案例</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 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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 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-fdd717e0><!--[--><!--]--><div class="right-menu-padding theme-default-content" data-v-fdd717e0><!--[--><!--]--><div class="right-menu-wrapper" data-v-fdd717e0 data-v-64666cd5><div class="right-menu-margin" data-v-64666cd5><div class="right-menu-title" data-v-64666cd5>目录</div><div class="right-menu-content" data-v-64666cd5><!--[--><!--]--></div></div></div><div data-v-fdd717e0><h2 id="用户问题" tabindex="-1"><a class="header-anchor" href="#用户问题" aria-hidden="true">#</a> 用户问题 </h2><p>arthas怎么分析cpu很高</p><hr><h2 id="专家官方解答" tabindex="-1"><a class="header-anchor" href="#专家官方解答" aria-hidden="true">#</a> 专家官方解答 </h2><p>为了解决问题「arthas arthas怎么分析cpu很高」我们可以按照以下步骤利用Arthas进行分析</p><h3 id="_1-确保arthas已准备就绪" tabindex="-1"><a class="header-anchor" href="#_1-确保arthas已准备就绪" aria-hidden="true">#</a> 1. 确保Arthas已准备就绪</h3><p>首先请确保您已经按照Arthas的<a href="#PF0vt">快速启动</a>指南成功下载并安装了Arthas。如果您还未安装可以通过以下命令快速安装</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token function">curl</span> <span class="token parameter variable">-O</span> https://arthas.aliyun.com/arthas-boot.jar
<span class="token function">java</span> <span class="token parameter variable">-jar</span> arthas-boot.jar
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div></div></div><p>选择目标Java进程进行挂载后您将看到Arthas的启动信息表明它已准备好接受命令。</p><h3 id="_2-排除gc影响" tabindex="-1"><a class="header-anchor" href="#_2-排除gc影响" aria-hidden="true">#</a> 2. 排除GC影响</h3><p>根据Arthas的使用指导首先运行<code>dashboard</code>命令来检查系统状态重点关注Memory部分的信息。这一步是为了排除内存使用满或GC频率过高导致的CPU升高。观察</p><ul><li><strong>内存使用情况</strong>:是否接近满载?</li><li><strong>GC计数</strong>:频率是否异常高?</li></ul><h3 id="_3-定位高cpu消耗线程" tabindex="-1"><a class="header-anchor" href="#_3-定位高cpu消耗线程" aria-hidden="true">#</a> 3. 定位高CPU消耗线程</h3><p><code>dashboard</code>命令的输出中继续关注进程相关信息找出CPU消耗较高的线程。注意排在列表前面的线程思考它们可能与程序的哪部分操作相关。</p><h3 id="_4-深入分析高cpu线程" tabindex="-1"><a class="header-anchor" href="#_4-深入分析高cpu线程" aria-hidden="true">#</a> 4. 深入分析高CPU线程</h3><p>使用<code>thread -n 8</code>命令来深入查看最忙的8个线程的堆栈信息。这将帮助您定位到具体哪个方法或代码块消耗了大量CPU资源。仔细查看这些线程的堆栈跟踪通常最频繁出现的方法就是性能瓶颈所在。</p><h3 id="解释说明" tabindex="-1"><a class="header-anchor" href="#解释说明" aria-hidden="true">#</a> 解释说明</h3><ul><li><strong>排除GC影响</strong>因为频繁的垃圾回收也会占用CPU资源因此首先需要确认CPU高负载是否由于GC引起。</li><li><strong>定位高CPU线程</strong>通过查看线程信息可以直接找到导致CPU过载的源头这是问题定位的关键步骤。</li><li><strong>深入分析</strong>:通过堆栈信息,我们可以具体到代码层面,了解哪些方法执行时间过长,从而进行针对性的优化。</li></ul><p>以上步骤依托于Arthas提供的功能能够有效地帮助您诊断并定位导致CPU使用率过高的原因。如果在执行过程中遇到任何疑问或需要进一步的帮助请随时告知。</p><!----><h2 id="参考链接" tabindex="-1"><a class="header-anchor" href="#参考链接" aria-hidden="true">#</a> 参考链接 </h2><p>*专家经验Arthas 如何借助arthas诊断cpu过高的原因</p><p>*专家经验Arthas 快速启动</p><p>*专家经验Arthas 介绍</p><!----><h2 id="答疑服务说明" tabindex="-1"><a class="header-anchor" href="#答疑服务说明" aria-hidden="true">#</a> <!----></h2><p>本内容经由技术专家审阅的用户问答的镜像生成,我们提供了<!---->,在<!---->。您也可以访问 : <a href="https://answer.opensource.alibaba.com/docs/intro" target="_blank" rel="noopener noreferrer">全局专家答疑<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 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