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HHemantinhksoldev.hashnode.dev·5d ago · 4 min read

Database Connection Pooling Explained

The Hidden Cost of Querying Your Database When I first started building backend APIs, I had a simple mental model: A request comes in. The server queries the database. The database returns the data

MKManish Kumarinmanishmk.hashnode.dev·Jan 13 · 4 min read

How to Fix Next.js MongoDB Connection Errors That Crash Your App

Alright, so you built a Next.js app with MongoDB. It works on your laptop. You deploy it. Feels great, right? Then a week later... BOOM. App's down. Users can't log in. You're panicking. You check MongoDB and see: "Too many connections" What the hell...

RKRahul Kaushalinrahulkaushal.hashnode.dev·Nov 2, 2025 · 9 min read

Why Your FastAPI DB Pool Never Fails in Dev (And Explodes in Prod)

Your FastAPI app is humming in dev. Endpoints respond in under 50ms, tests pass, the team is happy. You ship to prod. Traffic climbs past 80 concurrent users and suddenly... your database pool is exhausted, requests are hanging, and your monitoring s...