18. Performance Optimization

This module focuses on practical tuning across query design, indexing, and routine maintenance.

Optimization Layers

Layer	Scope
Query	SQL structure, filtering, join strategy
Index	B-tree/GIN/GiST design, partial/expression indexes
Stats	ANALYZE, planner estimates
Maintenance	VACUUM, autovacuum, bloat control
Observability	slow query logs, pg_stat_statements

Lessons

• Query Profiling and EXPLAIN
• Server Configuration Tuning

What's Next

• Continue to 19. Backup and Recovery