https://anTtutu.github.io/tags/dump/ Recent content in Dump on Anttu's Blog Hugo zh-CN Tue, 10 Aug 2021 00:29:47 +0800 https://anTtutu.github.io/post/2021-08-10-jvm_dump_analyse/ Tue, 10 Aug 2021 00:29:47 +0800 https://anTtutu.github.io/post/2021-08-10-jvm_dump_analyse/ <h2 id="前言">前言</h2> <p>参考dump文件的大小，如果超过6G、8G 一般我们本地电脑无法打开，可以找大容量的linux服务器，配置对应启动的jvm 内存后可以参考下面的步骤</p> <h2 id="1下载linux版本的mat">1、下载linux版本的mat</h2> <div class="highlight"><div style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>wget http://eclipse.stu.edu.tw/mat/1.9.0/rcp/MemoryAnalyzer-1.9.0.20190605-linux.gtk.x86_64.zip </span></span></code></pre></td></tr></table> </div> </div><h2 id="2解压zip包">2、解压zip包</h2> <pre tabindex="0"><code>unzip MemoryAnalyzer-1.9.0.20190605-linux.gtk.x86_64.zip </code></pre><h2 id="3修改linux-mat的堆内存大小看自己下载的堆的大小默认mat的堆支持1g">3、修改linux mat的堆内存大小（看自己下载的堆的大小，默认mat的堆支持1g）</h2> <div class="highlight"><div style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>vi MemoryAnalyzer.ini </span></span></code></pre></td></tr></table> </div> </div><div class="highlight"><div style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">4 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">5 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">6 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-ini" data-lang="ini"><span style="display:flex;"><span><span style="color:#1f2328">-startup</span> </span></span><span style="display:flex;"><span><span style="color:#1f2328">plugins/org.eclipse.equinox.launcher_1.5.0.v20180512-1130.jar</span> </span></span><span style="display:flex;"><span><span style="color:#1f2328">--launcher.library</span> </span></span><span style="display:flex;"><span><span style="color:#1f2328">plugins/org.eclipse.equinox.launcher.gtk.linux.x86_64_1.1.700.v20180518-1200</span> </span></span><span style="display:flex;"><span><span style="color:#1f2328">-vmargs</span> </span></span><span style="display:flex;"><span><span style="color:#1f2328">-Xmx10240m</span> </span></span></code></pre></td></tr></table> </div> </div><h2 id="4执行分析脚本">4、执行分析脚本</h2> <div class="highlight"><div style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>./ParseHeapDump.sh <span style="color:#0550ae">[</span>hprof文件<span style="color:#0550ae">]</span> org.eclipse.mat.api:suspects org.eclipse.mat.api:overview org.eclipse.mat.api:top_components </span></span></code></pre></td></tr></table> </div> </div><h3 id="可能因为-jdk-版本不一致导致启动失败可以调整-jdk-为18">可能因为 jdk 版本不一致导致启动失败，可以调整 jdk 为1.8.*</h3> <div class="highlight"><div style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"> <table style="border-spacing:0;padding:0;margin:0;border:0;"><tr><td style="vertical-align:top;padding:0;margin:0;border:0;"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2 </span><span style="white-space:pre;-webkit-user-select:none;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3 </span></code></pre></td> <td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%"> <pre tabindex="0" style="background-color:#f7f7f7;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span><span style="color:#6639ba">export</span> <span style="color:#953800">JAVA_HOME</span><span style="color:#0550ae">=</span>/opt/soft/jdk/jdk1.8.0_66/ </span></span><span style="display:flex;"><span><span style="color:#6639ba">export</span> <span style="color:#953800">PATH</span><span style="color:#0550ae">=</span><span style="color:#953800">$JAVA_HOME</span>/bin:<span style="color:#953800">$PATH</span> </span></span><span style="display:flex;"><span><span style="color:#0a3069">&#34;</span><span style="color:#cf222e">$(</span>dirname -- <span style="color:#0a3069">&#34;</span><span style="color:#953800">$0</span><span style="color:#0a3069">&#34;</span><span style="color:#cf222e">)</span><span style="color:#0a3069">&#34;</span>/MemoryAnalyzer -consolelog -application org.eclipse.mat.api.parse <span style="color:#0a3069">&#34;</span><span style="color:#953800">$@</span><span style="color:#0a3069">&#34;</span> </span></span></code></pre></td></tr></table> </div> </div><h2 id="5等待分析结果">5、等待分析结果</h2> <p> <img class="mx-auto" alt="" src="https://anTtutu.github.io/posts/dump/analyse_result.png" /> </p>