https://www.postgresscripts.com/tags/pg_stat_bgwriter/Recent content in Pg_stat_bgwriter on Postgres ScriptsHugo -- gohugo.ioenPostgresScripts.comThu, 02 Apr 2026 00:00:00 +0000https://www.postgresscripts.com/post/identify-insert-only-tables-in-postgresql/Thu, 02 Apr 2026 00:00:00 +0000https://www.postgresscripts.com/post/identify-insert-only-tables-in-postgresql/ <h2 id="identify-insert-only-tables-in-postgresql-using-pg_stat_user_tables">Identify Insert-Only Tables in PostgreSQL Using pg_stat_user_tables</h2> <p>Not all PostgreSQL tables behave the same way. Most application tables have a mix of inserts, updates, and deletes. A minority of tables receive only inserts. These append-only tables — event logs, audit trails, sensor readings, message queues — have fundamentally different storage and maintenance characteristics.</p> <p>A DBA who treats an insert-only table the same as a general-purpose table will misconfigure autovacuum, miss partitioning opportunities, and misread bloat signals. The starting point is knowing which tables are insert-only. PostgreSQL tracks per-table DML counts in <code>pg_stat_user_tables</code>, and a simple query against that view identifies them.</p>