https://netguide.jp/en/tags/maintenance/Recent content in Maintenance on KaisekukunHugo -- gohugo.ioenKaisekukunSat, 04 Jul 2026 02:44:02 +0900https://netguide.jp/en/software/postgres-database-maintenance/Mon, 22 Jun 2026 15:00:00 +0900https://netguide.jp/en/software/postgres-database-maintenance/<img src="https://netguide.jp/img/thumbnail/postgres-database-maintenance-en.png" alt="Featured image of post PostgreSQL Maintenance Basics for Stable Production" /><p>When running PostgreSQL in production, performance can degrade and transactions can bloat without you noticing. This article covers the maintenance fundamentals you need to keep PostgreSQL running smoothly.</p> <h2 id="1-vacuum-cleaning-up-dead-tuples">1. VACUUM: Cleaning Up Dead Tuples </h2><p>PostgreSQL uses MVCC (Multi-Version Concurrency Control), which means old row versions (dead tuples) linger in tables after updates and deletes. Left unchecked, tables bloat and performance suffers.</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-sql" data-lang="sql"><span style="display:flex;"><span><span style="color:#75715e">-- Run a standard VACUUM (does not block other operations) </span></span></span><span style="display:flex;"><span><span style="color:#66d9ef">VACUUM</span>; </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#75715e">-- Reclaim space to the OS (acquires table lock) </span></span></span><span style="display:flex;"><span><span style="color:#66d9ef">VACUUM</span> <span style="color:#66d9ef">FULL</span>; </span></span></code></pre></div><p>Production environments have <code>autovacuum</code> enabled by default, but busy tables may need tuned settings:</p>