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Historical version. PostgreSQL 9.0 reached end of support in October 2015. See the current version for supported releases.
PostgreSQL 9.0.23 Documentation
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Chapter 54. Database Physical Storage

Table of Contents
54.1. Database File Layout
54.2. TOAST
54.3. Free Space Map
54.4. Visibility Map
54.5. 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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