Postgresql on Database DevPro https://DatabaseDevPro.com/tags/postgresql/ Recent content in Postgresql on Database DevPro Hugo -- gohugo.io en jeff.taakey@gmail.com (Jeff Taakey) jeff.taakey@gmail.com (Jeff Taakey) © 2026 Jeff Taakey Sat, 07 Feb 2026 00:00:00 +0000 PostgreSQL Index vs Full Scan: EXPLAIN ANALYZE on 100k / 1M / 5M Rows (Filter + ORDER BY + LIMIT) https://DatabaseDevPro.com/labs/postgresql/index-vs-full-scan/ Sat, 07 Feb 2026 00:00:00 +0000 jeff.taakey@gmail.com (Jeff Taakey) https://DatabaseDevPro.com/labs/postgresql/index-vs-full-scan/ A reproducible lab showing how a composite index changes the execution plan from (parallel) seq scan + sort to index scan + limit, with EXPLAIN (ANALYZE, BUFFERS) evidence on 100k/1M/5M rows. PostgreSQL Labs https://DatabaseDevPro.com/labs/postgresql/ Sat, 07 Feb 2026 00:00:00 +0000 jeff.taakey@gmail.com (Jeff Taakey) https://DatabaseDevPro.com/labs/postgresql/ <h2 class="relative group">Focus areas <div id="focus-areas" 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="#focus-areas" aria-label="Anchor">#</a> </span> </h2> <ul> <li>Query planning: <strong>EXPLAIN / EXPLAIN ANALYZE</strong></li> <li>Index design and trade-offs (composite indexes, index-only scans)</li> <li>JSONB and GIN indexing patterns</li> <li>Locking and concurrency diagnostics</li> <li>Practical performance workflows (plan → hypothesis → change → validate)</li> </ul> <h2 class="relative group">Labs <div id="labs" 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="#labs" aria-label="Anchor">#</a> </span> </h2> <p>Below are the PostgreSQL labs available on this site.</p> PostgreSQL Guides https://DatabaseDevPro.com/guides/postgresql/ Mon, 01 Jan 0001 00:00:00 +0000 jeff.taakey@gmail.com (Jeff Taakey) https://DatabaseDevPro.com/guides/postgresql/ <h2 class="relative group">Scope <div id="scope" 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="#scope" aria-label="Anchor">#</a> </span> </h2> <p>This section focuses on <strong>how PostgreSQL works and how to reason about it</strong>, not on benchmarks alone.</p>