Prisma Connection Pool Exhausted - Cannot Connect to Database

1. Prisma Client not being reused across requests - creating new instances continuously
2. Database connection pool size too small for concurrent requests
3. Connections not being closed properly after queries
4. Long-running queries holding connections idle
5. Pool timeout set too low, causing connection exhaustion

Create a singleton Prisma Client instance: export const prisma = new PrismaClient(); // import in routes

Configure connection pool in DATABASE_URL: postgresql://user:pass@host/db?schema=public&connection_limit=5

Add proper error handling and disconnect: process.on('SIGINT', async () => { await prisma.$disconnect(); })