PostgreSQL Performance¶

Performance tuning starts with good queries and proper indexes.

Key areas¶

• query design
• indexes
• vacuum and analyze
• configuration tuning
• monitoring slow queries

Explain a query¶

EXPLAIN SELECT * FROM users WHERE email = 'arun@example.com';

Analyze actual execution¶

EXPLAIN ANALYZE SELECT * FROM users WHERE email = 'arun@example.com';

Create an index¶

CREATE INDEX idx_users_email ON users(email);

Keep learning¶

Add future notes here on: - index types - query plans - autovacuum - memory settings