Chapter 74. Database Physical Storage
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Chapter 74. Database Physical Storage

Table of Contents

74.1. Database File Layout
74.2. TOAST
74.2.1. Out-of-Line, On-Disk TOAST Storage
74.2.2. Out-of-Line, In-Memory TOAST Storage
74.3. Free Space Map
74.4. Visibility Map
74.5. The Initialization Fork
74.6. Database Page Layout
74.7. Heap-Only Tuples (HOT)

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

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73.2. Implementation Home 74.1. Database File Layout