Supabase Connection Pooling with PgBouncer on Vercel Serverless
The most common production failure pattern for Next.js + Supabase apps on Vercel isn't a code bug — it's connection exhaustion. Your app works fine in development, handles moderate traffic in staging, then falls over under real load with too many connections errors.
This happens because serverless functions don't maintain persistent database connections. Every function invocation opens a new connection. Under load, you can have hundreds of concurrent connections, and Postgres has a hard limit. PgBouncer is the solution, and Supabase ships it built-in. This guide explains how to configure it correctly.
Estimated read time: 12 minutes
Prerequisites
