PostgreSQL Performance Optimization: Why Connection Pooling Is Critical at Scale

If you’ve ever scaled an app and suddenly your database starts struggling even though your queries are optimized, you’re not alone. The issue often isn’t your SQL. It’s your connections. Let’s break this down with a real-world story so it actually sticks. Content The Scenario: A Busy Food Delivery App The Problem Appears The Hidden Problem: Too Many Connections What Actually Happens Do the Math The CPU Problem: Context Switching Why This Breaks at Scale The Solution: Connection Pooling Think of