https://pawelurbanek.com/postgresql-fix-performance

PostgreSQL database queries are a common performance bottleneck for web apps. Before you resort to more complex optimization techniques like caching or read replicas, you should double-check if your database engine is correctly tuned and queries are not underperforming. In this blog post, I present a step by step guide on using PG Extras library to spot and resolve common PostgreSQL database performance issues.