How do I set up database connection pooling in Node.js?

How do I set up database connection pooling in Node.js?

To set up database connection pooling in Node.js, you can use the mysql or pg library. Do you have a specific database in mind?

I'm using MySQL. Can you show me a code example?

Sure! Here's a simple example using the mysql library:

const mysql = require('mysql');

const pool = mysql.createPool({
  connectionLimit: 10,
  host: 'localhost',
  user: 'yourUsername',
  password: 'yourPassword',
  database: 'yourDatabase'
});

pool.getConnection((err, connection) => {
  if (err) throw err; // not connected!
  console.log('Connected as id ' + connection.threadId);
  connection.release(); // return the connection to the pool
});

What are the benefits of using connection pooling?

Connection pooling improves performance by reusing existing connections, reducing the overhead of establishing new connections for each request.

Are there any downsides to using connection pooling?

Yes, potential downsides include increased complexity in managing connections and the possibility of exhausting the pool if not configured properly.