does mongoose use multipe threads/processes/worker internally?

I was wondering, if mongoose uses its own processes/workers internally to handle multiple access to a MongoDB via one connection?

I could not find any information.

You can specify the pool size of the Mongoose connection using:

    var uri = 'mongodb://localhost/test';
    mongoose.createConnection(uri, { server: { poolSize: 4 }});

Read 'Connection Pools' at http://mongoosejs.com/docs/connections.html