Connections *sometimes* take far too long
I run a Droplet with Ubuntu 17.10.
My Droplet is a server using Nginx. Independently of this, it also hosts a Docker registry on another port.
The website exposed by Nginx works fine most of the time and loads quickly. However, sometimes, and I haven't noticed a pattern when, the website will refuse to load for almost a minute or so. Retrying the connection doesn't help. Once the website has finally loaded, it becomes much faster again.
The Docker registry works, since I can successfully upload test programs to it. However, when I try to upload larger things, it becomes extremely slow to the point where it is effectively unusable.
I don't know if these two problems are related.