https://blog.ivanwz.com/tags/%E6%80%A7%E8%83%BD%E6%8E%92%E6%9F%A5/Recent content in 性能排查 on 云原生技术栈Hugo -- gohugo.iozh-cnhello@example.com (Ivan)hello@example.com (Ivan)© 2026 IvanFri, 19 Jun 2026 00:00:00 +0000https://blog.ivanwz.com/posts/posts/linux/linux-observability-basics/Fri, 19 Jun 2026 00:00:00 +0000hello@example.com (Ivan)https://blog.ivanwz.com/posts/posts/linux/linux-observability-basics/<p>Linux 故障排查的第一步不是立刻修改配置，而是先建立足够清晰的观察面。CPU、内存、磁盘和网络通常能解释大多数系统层面的异常。</p> <h2 class="relative group">CPU <div id="cpu" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#cpu" aria-label="锚点">#</a> </span> </h2> <p>使用 <code>top</code> 或 <code>htop</code> 可以快速判断系统是否存在 CPU 饱和。</p> <div class="highlight-wrapper"><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-bash" data-lang="bash"><span class="line"><span class="cl">top </span></span><span class="line"><span class="cl">uptime </span></span><span class="line"><span class="cl">mpstat <span class="m">1</span></span></span></code></pre></div></div> <p>重点关注 load average、用户态 CPU、系统态 CPU、iowait 和上下文切换。如果 load 很高但 CPU 使用率不高，需要进一步判断是否存在 IO 阻塞。</p>