https://nalar.dev/tags/durability/ Recent content in Durability on Nalar Hugo en-us Tue, 15 Sep 2026 00:00:00 +0700 https://nalar.dev/postgresql-full-page-writes-raise-wal-volume-after-checkpoints/ Tue, 15 Sep 2026 00:00:00 +0700 https://nalar.dev/postgresql-full-page-writes-raise-wal-volume-after-checkpoints/ <p>A PostgreSQL page modified for the first time after a checkpoint can generate much more WAL than a later modification to the same page. With <code>full_page_writes</code> enabled, the first protected change records a full page image so crash recovery can reconstruct a page even if an operating-system failure interrupts a physical page write.</p> <p>That protection creates a recurring WAL pattern tied to checkpoint boundaries. A checkpoint resets the condition for pages, and subsequent writes gradually encounter pages that need a new full page image.</p>