PostgreSQL implements MVCC in a slightly different way when compared to databases like Oracle, MySQL, and others. In PostgreSQL, you'll see a different method for managing UNDO, which requires a cleanup concept called vacuum. It is now important for PostgreSQL admins/DevOps to understand the internals of autovacuum and the MVCC implementation. Let us discuss MVCC and autovacuum in this talk in detail.
This talk includes a discussion of the following topics in detail:
- MVCC and Autovacuum Internals in PostgreSQL.
- Tuning Autovacuum.
- Problems you may see in a busy OLTP database with untuned autovacuum settings.
- Enhancements in PostgreSQL 14
