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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 查看方法耗时 | arthas</title><meta name="description" content="要使用Arthas来查看方法的耗时，可以依据提供的知识进行以下操作：1. **启动Arthas并连接到目标Java进程** 首先，你需要启动Arthas工具并连接到你想要监控的Java应用程序。在命令行中，运行Arthas的启动脚本（例如在Mac或Linux环境下通常是`./as.sh`），">
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>其中，<code>class-pattern</code>和<code>method-pattern</code>用于指定你想要跟踪的类和方法名的模式匹配表达式。例如，如果你想监控所有<code>com.example.service</code>包下以<code>Service</code>结尾的类中的所有方法耗时，可以这样操作：</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>trace com.example.service.*Service *.*
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>这个命令会显示匹配到的方法每次被调用的耗时以及调用栈信息。</p></li><li><p><strong>分析结果</strong><br> 执行上述命令后，Arthas会开始实时监控指定方法的调用情况，展示每个调用的详细耗时及调用路径。这将帮助你识别出哪些方法是最耗时的，从而进一步分析和优化。</p></li></ol><p><strong>注意点解释：</strong></p><ul><li><strong>自动高亮显示</strong>：Arthas的<code>trace</code>命令通过颜色编码直观地展示了方法调用的时间消耗，红色表示较慢的调用，这使得性能瓶颈一目了然。</li><li><strong>自定义条件与排序</strong>：通过添加条件表达式和调整输出的排名数量，你可以更加精确地控制监控范围，专注于最关键的信息。</li><li><strong>结果查看方式</strong>：虽然原始知识中提到了通过浏览器查看profiler结果的方式，但那部分是关于查看arthas-output下的结果，与直接监控方法耗时的<code>trace</code>命令不同。对于<code>trace</code>命令，结果会直接在命令行界面输出。</li></ul><p>综上所述，利用Arthas的<code>trace</code>命令是监控Java应用中方法调用耗时的有效手段，可以帮助开发者快速定位和优化性能问题。请根据你的具体需求调整命令参数，以达到最佳的监控效果。</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>*<a href="https://github.com/alibaba/arthas/tree/master/site/docs/doc/arthas3.md" target="_blank" rel="noopener noreferrer">### Arthas3.0 的新特性<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><p>*<a href="https://github.com/alibaba/arthas/tree/master/site/docs/doc/profiler.md" target="_blank" rel="noopener noreferrer"># profiler<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><p>*专家经验：利用Arthas排查NoSuchMethodError</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 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> 。 咨询其他产品的的问题</p><h3 id="反馈" tabindex="-1"><a class="he
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