99% of Developers Don't Get PostgreSQL

Deep dive into PostgreSQL's internal architecture, covering its ACID implementation, object-relational model, and storage mechanisms. Explains multi-version concurrency control (MVCC) for handling concurrent transactions without blocking, the TOAST system for managing oversized data, and write-ahead logging (WAL) for durability and crash recovery. Includes details on heap files, page organization, tuple versioning, vacuum processes, and checkpoint mechanisms that ensure data consistency and performance at scale.