PostgreSQL 9.6.12 Documentation
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Chapter 30. Reliability and the Write-Ahead Log

Table of Contents
30.1. Reliability
30.2. Write-Ahead Logging (WAL)
30.3. Asynchronous Commit
30.4. WAL Configuration
30.5. WAL Internals

This chapter explains how the Write-Ahead Log is used to obtain efficient, reliable operation.

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