Monitoring Replication Health
Learn to effectively monitor the status and health of your replication setup to proactively identify and resolve issues.
Why Monitor Replication?
PostgreSQL replication is key for high availability and read scalability. But how do you know if it's working correctly?
Monitoring replication health is crucial to ensure your standby servers are up-to-date and ready to take over if the primary fails. Without it, you might discover issues only when it's too late!
Key Replication Metrics
When monitoring replication, you'll want to keep an eye on a few key metrics:
- Replication Status: Is the standby connected and actively receiving data?
- Replication Lag: How far behind is the standby compared to the primary?
- WAL Activity: Are Write-Ahead Log (WAL) files being transferred and applied correctly?
All lessons in this course
- Automatic Failover Tools (Patroni)
- Monitoring Replication Health
- Disaster Recovery Strategies
- Connection Routing with PgBouncer and HAProxy