/tags/database/Recent content in Database on Gaurav.devHugoen-US© 2026 Gaurav. Built with care and clean code.Sun, 30 Aug 2026 00:00:00 +0000/posts/postgresql-performance-basics/Sun, 30 Aug 2026 00:00:00 +0000/posts/postgresql-performance-basics/<p>When a PostgreSQL-backed application slows down, larger infrastructure can hide the symptom while preserving the cause. A better response starts with evidence.</p> <h2 id="find-the-expensive-work">Find the expensive work</h2> <p>Enable and review query statistics, then rank statements by total time—not only average duration. A moderately slow query executed thousands of times may cost more than one dramatic report. Correlate database behaviour with application endpoints, background jobs, and recent releases.</p> <p>Use <code>EXPLAIN (ANALYZE, BUFFERS)</code> on a safe environment with representative data. Look for large row-estimate errors, sequential scans over selective predicates, repeated nested operations, sorting that spills to disk, and far more rows removed than returned.</p>