Database performance issues rarely announce themselves politely. They tend to appear as gradual slowdowns that suddenly become critical under load. A systematic approach to tuning prevents these crises and keeps your applications responsive.
Start with Monitoring
Before you can fix performance problems, you need to see them. Instrument your databases with monitoring that captures query execution times, lock contention, connection pool utilisation, and disk I/O. Without data, tuning is guesswork.
The Usual Suspects
- Missing indexes — The single most common cause of slow queries. Analyze your query patterns and add indexes that support them.
- N+1 queries — Application code that issues one query per row instead of a single batch query. Fix these at the application layer.
- Unoptimized joins — Large table joins without proper indexes or with unnecessary columns can be orders of magnitude slower than they need to be.
- Connection pool exhaustion — If your application opens more connections than the database can handle, everything queues up.
Ongoing Maintenance
Performance tuning is not a one-time project. Schedule regular maintenance windows for index rebuilds, statistics updates, and capacity reviews. What performs well today may not perform well at twice the data volume.
Struggling with database performance? Our database engineers can help.