内存 on Margrop Blog https://blog.margrop.net/en/tag/%E5%86%85%E5%AD%98/ Recent content in 内存 on Margrop Blog Hugo -- gohugo.io en-US Wed, 29 Jul 2026 08:00:00 +0800 Restart Is Not Magic: Why Turning a Computer Off and On Seems to Fix 99% of Its Problems https://blog.margrop.net/en/post/why-restart-fixes-99-percent-%E9%87%8D%E5%90%AF/ Wed, 29 Jul 2026 08:00:00 +0800 https://blog.margrop.net/en/post/why-restart-fixes-99-percent-%E9%87%8D%E5%90%AF/ The short version A restart is not magic, and it does not repair every fault. It is closer to emptying a room that has been used for months without cleaning: borrowed items are collected, people take fresh queue numbers, temporary notes disappear, and doors and appliances are initialized again. The system returns to a cleaner and more predictable starting point. When “restart fixed it” is true, the fault is often in volatile state, not in permanently damaged hardware, a configuration that is always wrong, or an application whose root cause has disappeared. Installing and Using gperftools to Analyze Java Off-Heap Memory https://blog.margrop.net/en/post/gperftools-install-analysis-memory-out-of-heap/ Tue, 30 Mar 2021 09:54:54 +0800 https://blog.margrop.net/en/post/gperftools-install-analysis-memory-out-of-heap/ <h1 id="centos">CentOS</h1> <ul> <li>Install using yum</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>yum install gperftools libunwind </span></span></code></pre></div><ul> <li>Optional, PDF support</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>yum install graphviz </span></span></code></pre></div><ul> <li>Set environment variables</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>export LD_PRELOAD<span style="color:#f92672">=</span>/usr/lib64/libtcmalloc.so </span></span><span style="display:flex;"><span>export HEAPPROFILE<span style="color:#f92672">=</span>/DATA1/admin_tmp/gzip </span></span></code></pre></div>