Chapter 65. Database Physical Storage
Prev UpPart VII. InternalsHome Next

Chapter 65. Database Physical Storage

Table of Contents

65.1. Database File Layout
65.2. TOAST
65.2.1. Out-of-Line, On-Disk TOAST Storage
65.2.2. Out-of-Line, In-Memory TOAST Storage
65.3. Free Space Map
65.4. Visibility Map
65.5. The Initialization Fork
65.6. Database Page Layout
65.6.1. Table Row Layout
65.7. Heap-Only Tuples (HOT)

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

Prev Up Next
64.6. Hash Indexes Home 65.1. Database File Layout