Load Testing JupyterHub

Hello,

We've been operating a JupyterHub instance for some time, and are now 
looking to gain some insight into the maximum number of users or 
notebooks that our current hardware can handle. Basically we want to do 
some load testing on our JupyterHub environment.

Since we are surely not alone in doing this sort of testing, I wanted to 
ask the Jupyter development community what options and tools are out 
there, and which work well with JupyterHub. What are people using? What 
are the best practices?

Thorin