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# Chapter 70. Database Physical Storage

Table of Contents

70.1. Database File Layout

70.2. TOAST

70.2.1. Out-of-Line, On-Disk TOAST Storage

70.2.2. Out-of-Line, In-Memory TOAST Storage

70.3. Free Space Map

70.4. Visibility Map

70.5. The Initialization Fork

70.6. Database Page Layout

70.6.1. Table Row Layout

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

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Last Updated: Fri Apr 08 2022 21:09:33 GMT+0800