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Historical version. PostgreSQL 9.3 reached end of support in November 2018. See the current version for supported releases.
PostgreSQL 9.3.25 Documentation
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Chapter 58. Database Physical Storage

Table of Contents
58.1. Database File Layout
58.2. TOAST
58.3. Free Space Map
58.4. Visibility Map
58.5. The Initialization Fork
58.6. Database Page Layout

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

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Examples Up Database File Layout

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