Write-Ahead Logging (WAL)

Write-Ahead Logging (WAL) is a standard method for ensuring data integrity and durability in database systems. It records all changes to data in a log before applying them to the database, allowing for recovery in case of system failure.

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9/10/2025

WAL Explained: How Databases Survive Crashes & Prevent Data Loss

Understand Write-Ahead Logging (WAL) and its critical role in database crash recovery. Learn how WAL prevents data loss, how it works in PostgreSQL, and manage common WAL issues.

6 sections