WAL: Everything you want to know

PostgreSQL's WAL is one of the core points of PostgreSQL, and used in many areas: Backup, replication, etc. In this talk, I will mention about everything about WAL that a PostgreSQL DBA must know: - What is WAL? - What does it include?

- How to read it?

- What about wal_level?

- Full page writes

- Replication and WAL

- Backup and WAL

- PITR and WAL

- Other topics