Node.js + mongoose. Whether to keep 1 connection or open / close for each request?

Question

MongoDB

Good afternoon.
I recently started learning node.js.
As a database - mongodb. I use mongoose to work with it.
Initially created a new connection for each request and closed at the end. Sometimes there were errors like "connection closed" when a request was sent using an already closed connection. It is clear that this is due to my curvature in matters of asynchronous code. But I thought about this question. Is it worth opening a new connection for each request, or is it better to create one for all?
I understand correctly that when using only 1 connection, it will be used for all users. And if you create a new one every time, then these connections will work in parallel?
Do not hit if you asked stupidity))

Answer 1

Mongoose itself is smart enough to manage connections. See the documentation (section Connection pools)

Answer 2

Theholmesoffice.com/mongoose-connection-best-practice might help

Answer 3

Why do extra work for every request? Why the extra level of callbacks?
It must be borne in mind that node.js applications live for a long time, and are not launched on every request.
You will not manually add gasoline to the tank after each stroke of the internal combustion engine?

Answer 4

Keep a pool of connections.