11th October 2018: PostgreSQL 11 RC 1 Released!
Supported Versions: Current (10) / 9.6 / 9.5 / 9.4 / 9.3
Development Versions: 11 / devel
Unsupported versions: 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.2 / 7.1

Chapter 53. Database Physical Storage

Table of Contents
53.1. Database File Layout
53.2. TOAST
53.3. Free Space Map
53.4. Visibility Map
53.5. Database Page Layout

This chapter provides an overview of the physical storage format used by PostgreSQL databases.