Chapter 57. Database Physical Storage

Table of Contents
57.1. Database File Layout
57.2. TOAST
57.3. Free Space Map
57.4. Visibility Map
57.5. The Initialization Fork
57.6. Database Page Layout

Note: At present, this section is just taken from PostgreSQL documentation and is subject to revision for Postgres-XL.

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