Looks like you don’t want to overload your server then. You can limit the concurrency with something like GenStage, custom dynamic task supervisor or Poolboy. If you do overload your server, you not only get the wrong measurements, but your whole system will be, well, overloaded, slow and less responsive.
Having said that, Elixir/Phoenix does scale well when it comes to handling many concurrent I/O tasks like making HTTP requests. So it might simply not get overloaded. But if it does, limiting concurrency would be my first task to look at.
