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PostgreSQL 8.3.23 Documentation
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Chapter 28. Reliability and the Write-Ahead Log

Table of Contents
28.1. Reliability
28.2. Write-Ahead Logging (WAL)
28.3. Asynchronous Commit
28.4. WAL Configuration
28.5. WAL Internals

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

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Disk Full Failure	Up	Reliability