---
title: "Data Page — Database Glossary | Xata"
description: "The fundamental I/O unit in PostgreSQL: an 8KB block containing row data, free space information, and item pointers. Tables and indexes are organized as..."
source: "https://xata.io/glossary/data-page"
---

# Data Page

Storage

The fundamental I/O unit in PostgreSQL: an 8KB block containing row data, free space information, and item pointers. Tables and indexes are organized as sequences of pages.

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