Chapter 69. Database Physical Storage
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Chapter 69. Database Physical Storage

Table of Contents

69.1. Database File Layout
69.2. TOAST
69.2.1. Out-of-line, on-disk TOAST storage
69.2.2. Out-of-line, in-memory TOAST storage
69.3. Free Space Map
69.4. Visibility Map
69.5. The Initialization Fork
69.6. Database Page Layout
69.6.1. Table Row Layout
69.7. Heap-Only Tuples (HOT)

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

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68.2. Implementation Home 69.1. Database File Layout