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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Chapter 30. Reliability and the Write-Ahead Log</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="disk-full.html" title="29.2. Disk Full Failure" /><link rel="next" href="wal-reliability.html" title="30.1. Reliability" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">Chapter 30. Reliability and the Write-Ahead Log</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="disk-full.html" title="29.2. Disk Full Failure">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="admin.html" title="Part III. Server Administration">Up</a></td><th width="60%" align="center">Part III. Server Administration</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="wal-reliability.html" title="30.1. Reliability">Next</a></td></tr></table><hr /></div><div class="chapter" id="WAL"><div class="titlepage"><div><div><h2 class="title">Chapter 30. Reliability and the Write-Ahead Log</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="wal-reliability.html">30.1. Reliability</a></span></dt><dt><span class="sect1"><a href="checksums.html">30.2. Data Checksums</a></span></dt><dd><dl><dt><span class="sect2"><a href="checksums.html#CHECKSUMS-OFFLINE-ENABLE-DISABLE">30.2.1. Off-line Enabling of Checksums</a></span></dt></dl></dd><dt><span class="sect1"><a href="wal-intro.html">30.3. Write-Ahead Logging (<acronym class="acronym">WAL</acronym>)</a></span></dt><dt><span class="sect1"><a href="wal-async-commit.html">30.4. Asynchronous Commit</a></span></dt><dt><span class="sect1"><a href="wal-configuration.html">30.5. <acronym class="acronym">WAL</acronym> Configuration</a></span></dt><dt><span class="sect1"><a href="wal-internals.html">30.6. WAL Internals</a></span></dt></dl></div><p>
This chapter explains how the Write-Ahead Log is used to obtain
efficient, reliable operation.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="disk-full.html" title="29.2. Disk Full Failure">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="admin.html" title="Part III. Server Administration">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="wal-reliability.html" title="30.1. Reliability">Next</a></td></tr><tr><td width="40%" align="left" valign="top">29.2. Disk Full Failure </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 30.1. Reliability</td></tr></table></div></body></html>
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