18. Performance Optimization

This module focuses on practical performance tuning across SQL design and server-level settings.

Lessons

• Query Profiling and EXPLAIN — use EXPLAIN, EXPLAIN ANALYZE, and slow query log to find bottlenecks
• Server Configuration Tuning — optimize buffer pools, connections, and I/O settings

Optimization Layers

Layer	Scope
Query	SQL structure, EXPLAIN analysis, index usage
Server	Buffer pool, connections, temp tables, I/O settings

What's Next

• Continue to 19. Backup and Recovery