Best Practices for WAL and Recovery
| Goal | Setting / Practice |
|---|---|
| Durability | Keep fsync = on, synchronous_commit = on |
| Performance | Tune checkpoint_timeout and max_wal_size |
| Backup safety | Enable archive_mode and archive_command |
| Recovery | Automate PITR with scripts or tools |
| Monitoring | Use pg_stat_bgwriter and LSN queries |
Conclusion
PostgreSQL’s WAL is the backbone of durability, replication, and recovery.
- It records all changes before writing to data files.
- It can be tuned for speed and reliability.
- It enables Point-in-Time Recovery to recover from human or system failures.
- And with built-in monitoring, you can track WAL health and replication lag in real time.
With proper WAL tuning, archiving, and monitoring, your PostgreSQL system can stay fast, reliable, and recoverable anytime.
Category: PostgreSQL