What are some examples of MongoDB connection pooling?

Can you explain what connection pooling is in MongoDB?

Connection pooling in MongoDB is a technique used to manage multiple connections to the database efficiently. It allows applications to reuse existing connections instead of creating new ones for every request, which improves performance.

What are some examples of how to implement connection pooling in a Node.js application?

In a Node.js application, you can use the MongoDB native driver or Mongoose. For example, with Mongoose, you can set the poolSize option when connecting to the database to specify the number of connections in the pool.

Can you show me a code snippet for that?

Sure! Here's a simple example:

const mongoose = require('mongoose');

mongoose.connect('mongodb://localhost:27017/mydatabase', {
  useNewUrlParser: true,
  useUnifiedTopology: true,
  poolSize: 10 // Set the pool size to 10
});

What happens if the pool size is exceeded?

If the pool size is exceeded, additional connection requests will be queued until a connection becomes available. This can lead to increased latency if the application frequently exceeds the pool size.