Programming Tutorials

  You deployed your Next.js application. It works perfectly on localhost. You push to Vercel, share the link, and everything looks great—until traffic spikes. Suddenly, your dashboard lights up with 500 errors, and your logs are screaming: FATAL: remaining connection slots are reserved for non-replication superuser connections  or  FATAL: sorry, too many clients already This is the classic "Serverless Impedance Mismatch." Your application scales infinitely, but your database does not. If you are using Prisma with Next.js in a serverless environment (Vercel, AWS Lambda, Netlify), managing database connections requires a completely different strategy than traditional Node.js servers. Here is the architectural root cause and the specific, production-grade implementation to fix it. The Root Cause: Why Serverless Kills Databases To fix the problem, you must understand how Serverless differs from a traditional monolithic server (like Express.js on a VPS). The Traditional Model ...