change data capture

Change data capture (CDC) in Postgres: replication slots, Debezium and the WAL risk

CDC turns every insert, update and delete into an event another system can read. The best method reads Postgres's own log, and its one sharp edge is a forgotten replication slot that quietly fills your disk. Here is how it works, what Debezium and Supabase do with it, and when you do not need any of it.

Aliteq Team · 3h ago · 10 min