// connection_reused fires when your pool hands out an existing connection
// rather than opening a new TCP connection to the database.
//
// New connection: TCP handshake + TLS + auth = 20–100ms overhead
// Reused connection: 0ms overhead
//
// Configure your pool size to maximise reuse under your concurrency:

// Prisma
const prisma = new PrismaClient({
  datasources: {
    db: { url: process.env.DATABASE_URL + '?connection_limit=10&pool_timeout=5' },
  },
});

// Mongoose
mongoose.connect(uri, {
  maxPoolSize: 10,   // max concurrent connections
  minPoolSize: 2,    // keep warm connections alive
  socketTimeoutMS: 30_000,
});