prisma-connection-pool-exhaustion

Prisma connection pool exhaustion occurs in serverless because each function cold start creates a new Prisma client opening multiple database connections, rapidly exceeding hosted database limits and causing timeout errors like P2024.

Fix Prisma connection timeouts on Vercel and AWS Lambda by enforcing a singleton pattern for the Prisma client, setting a single connection limit per instance, and enabling external pooling services like PgBouncer or Prisma Accelerate.

The best way to configure Prisma client connection limits for serverless is setting a low connection_limit parameter per client and enforcing Prisma singleton patterns to keep connection counts within database thresholds.

Prisma works with PgBouncer for serverless database connection pooling by mediating connections between serverless functions and the database, preventing direct connection overload and keeping total connections within database limits.

Use Prisma Accelerate instead of client-side connection limits when external connection mediation between serverless functions and the database is required, as singleton patterns and URL parameter tuning alone may not handle high concurrency on Vercel or AWS Lambda.