What is the purpose of database connection pooling in Node.js and what happens without it?

Question

Node.js Developer — Hard

What is the purpose of database connection pooling in Node.js and what happens without it?

Accepted Answer

Connection pooling in Node.js maintains reusable database connections, preventing the need to establish a new TCP connection for every query. Without it, the constant creation of new connections leads to high latency and resource exhaustion under load.