overload.exs

# Origin: https://blog.sequin.io/how-we-used-elixirs-observer-to-hunt-down-bottlenecks/
defmodule Overload do
  # Define a CPU-intenstive work function, which can call itself
  # recursively (forever)
  def recursive do
    :public_key.generate_key({:rsa, 4096, 65537})
    recursive()
  end
end

# Spawn twice number processes as much your machine has
for _ <- 1..(System.schedulers_online() * 2) do
  spawn_link(fn -> Overload.recursive() end)
end