The author discusses improving the performance of slow DELETE queries on PostgreSQL. They detail how foreign keys are not indexed by default, leading to triggers being run for every record being deleted, causing delays, especially with a large backlog. By adding necessary indexes to unindexed foreign keys, the queries ran significantly faster, clearing the backlog efficiently. The author’s unique approach and clear explanation make it easy to understand how to optimize query performance in PostgreSQL.
https://ivdl.co.za/2024/05/29/achieving-a-100x-speedup-of-deletes-on-postgresql/