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Chapter 63. Database Physical Storage
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Chapter 63. Database Physical Storage

Table of Contents

63.1. Database File Layout

63.2. TOAST

63.2.1. Out-of-line, on-disk TOAST storage
63.2.2. Out-of-line, in-memory TOAST storage

63.3. Free Space Map

63.4. Visibility Map

63.5. The Initialization Fork

63.6. Database Page Layout

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

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62.3. Extensibility	Home	63.1. Database File Layout

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