Chapter 75. Database Physical Storage
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Chapter 75. Database Physical Storage

Table of Contents

75.1. Database File Layout
75.2. TOAST
75.2.1. Out-of-Line, On-Disk TOAST Storage
75.2.2. Out-of-Line, In-Memory TOAST Storage
75.3. Free Space Map
75.4. Visibility Map
75.5. The Initialization Fork
75.6. Database Page Layout
75.6.1. Table Row Layout
75.7. Heap-Only Tuples (HOT)

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

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74.2. Implementation Home 75.1. Database File Layout