How to avoid missing files in PostgreSQL backups after recovery

Problem:

Performing an incremental backup after a recovery operation can cause issues if a full backup hasn’t been taken first. This might result in missing files in subsequent incremental backups.

Cause:

This happens because incremental backups rely on the continuous timeline of WAL (Write-Ahead Log) files. Recovery alters this timeline, causing subsequent incrementals to miss data from the pre-recovery state.

Solution:

To avoid missing files, always take a full backup after any recovery operation or any scenario where the WAL timeline changes. This creates a fresh baseline for future incremental backups, guaranteeing their completeness.

More information:

• Schedule regular full backups: Automate routine full backups at scheduled intervals (daily, weekly, etc.) to minimize the need for recovery and maintain a reliable backup chain.

• Monitor your backups: Regularly review your backup logs and confirm successful completion of both full and incremental backups.

By following these steps, you can restore your PostgreSQL database.