How does connection pooling work in Node.js with async/await?

How does connection pooling work in Node.js with async/await?

Connection pooling in Node.js allows multiple database connections to be reused, improving performance. With async/await, you can manage these connections more easily.

Can you show me a code example of using connection pooling with async/await?

Sure! Here's a simple example using the mysql2 library:

const mysql = require('mysql2/promise');

async function main() {
    const pool = mysql.createPool({
        host: 'localhost',
        user: 'root',
        database: 'test',
        waitForConnections: true,
        connectionLimit: 10,
        queueLimit: 0
    });

    const connection = await pool.getConnection();
    const [rows] = await connection.query('SELECT * FROM users');
    console.log(rows);
    connection.release();
}

main();

What are the benefits of using connection pooling?

The benefits include reduced connection overhead, improved performance, and better resource management, especially under high load.

Are there any downsides to using connection pooling?

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