Autovacuum

Identify Running PostgreSQL Autovacuum Worker Sessions Autovacuum lag is a slow accumulation. Every UPDATE rewrites the row and creates a new HOT chain, the launcher falls behind during write spikes, and over weeks a busy OLTP cluster ends up with three workers stuck on a handful of huge tables while smaller ones wait …

Tracking Active Vacuum and Autovacuum Workers in PostgreSQL PostgreSQL vacuum is the maintenance process that removes dead tuples left behind by updates and deletes, reclaims storage, and prevents transaction ID wraparound. On active databases, autovacuum runs continuously in the background, but knowing whether it is …

Detecting Soft Delete Patterns in PostgreSQL Soft deletes are a common application pattern. Instead of removing a row with a DELETE statement, the application marks it as deleted by setting a column — typically deleted_at — to a non-null timestamp. The row stays in the table forever. The application simply filters it …

Identify Insert-Only Tables in PostgreSQL Using pg_stat_user_tables 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 …

PostgreSQL Autovacuum Settings Query: Complete Guide to pg_settings Analysis This PostgreSQL query provides database administrators with essential insights into autovacuum configuration parameters by querying the pg_settings system view. Understanding these settings is crucial for optimal database performance and …