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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查看内存占用大的地方 | arthas</title><meta name="description" content="要使用Arthas来查看内存占用大的地方，可以遵循以下步骤进行分析与诊断：### 1. 初始检查首先，使用Arthas的`meminfo`命令来查看Arthas自身及其组件的内存占用情况，这能帮助我们了解基础的内存使用概况。```bash$ profiler meminfo```### 2. JVM">
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="_2-jvm内存状态概览" tabindex="-1"><a class="header-anchor" href="#_2-jvm内存状态概览" aria-hidden="true">#</a> 2. JVM内存状态概览</h3><p>接着，运行<code>memory</code>命令以获取当前Java虚拟机(JVM)的整体内存使用状态，包括堆内存、非堆内存以及各细分区域的使用详情。这一步对于识别内存是否泄漏及大致位置至关重要。</p><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code>$ memory
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="分析关键词解释" tabindex="-1"><a class="header-anchor" href="#分析关键词解释" aria-hidden="true">#</a> 分析关键词解释</h3><ul><li>观察<code>heap</code>区域，特别是<code>g1_old_gen</code>的增长情况，因为长期存活的对象通常在此积累。</li><li>注意<code>nonheap</code>区域，特别是<code>metaspace</code>的增长，过大的类元数据可能导致问题。</li><li>检查是否有特定的<code>codeheap</code>区域异常增长，这可能意味着即时编译的代码占用过多内存。</li></ul><h3 id="_3-定位内存泄漏" tabindex="-1"><a class="header-anchor" href="#_3-定位内存泄漏" aria-hidden="true">#</a> 3. 定位内存泄漏</h3><ul><li><strong>连续监控</strong>：多次执行<code>memory</code>命令并记录结果，关注任何持续增长的内存区域。</li><li><strong>堆转储分析</strong>：使用<code>heapdump</code>命令生成堆的快照，随后利用如Eclipse MAT等工具深入分析增长的对象类型和引用链路。</li></ul><div class="language-bash ext-sh line-numbers-mode"><pre class="language-bash"><code><span class="token punctuation">[</span>arthas@58205<span class="token punctuation">]</span>$ heapdump arthas-output/dump.hprof
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</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><h3 id="解释" tabindex="-1"><a class="header-anchor" href="#解释" aria-hidden="true">#</a> 解释</h3><p>通过对比不同时间点的<code>memory</code>命令输出，可以发现内存泄漏的趋势。而<code>heapdump</code>生成的堆转储文件能够提供泄露对象的详细信息，包括它们的数量、大小及引用关系，这对于定位具体泄漏源非常关键。</p><h3 id="注意事项" tabindex="-1"><a class="header-anchor" href="#注意事项" aria-hidden="true">#</a> 注意事项</h3><p>如果在尝试启动Arthas时遇到内存溢出错误，请确保目标应用有足够的内存分配，必要时调整JVM启动参数以增大可用内存。</p><h3 id="结论" tabindex="-1"><a class="header-anchor" href="#结论" aria-hidden="true">#</a> 结论</h3><p>综上所述，利用Arthas的<code>meminfo</code>和<code>memory</code>命令进行初步检查，结合周期性地生成并分析堆转储文件，是定位和解决内存占用过大或内存泄漏问题的有效策略。记得在进行分析前确保Arthas自身的内存占用不会干扰到诊断过程。</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="/doc/profiler.html" class="">profiler</a></p><p><a href="/doc/expert/user-question-history12455.html" class="">专家经验：Arthas 排查内存泄露的方法</a></p><p><a href="/doc/expert/user-question-history14832.html" class="">专家经验：arthas启动时内存溢出</a></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="header-anchor" href="#反馈" aria-hidden="true">#</a> 反馈</h3><p>如问答有错漏，欢迎点：<a href="https://ai.nacos.io/user/feedbackByEnhancerGradePOJOID?enhancerGradePOJOId=16070" target="_blank" rel="noopener noreferrer">差评<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>给我们反馈。</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/doc/expert/user-question-history13507.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
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