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We're going to be following the discussion and code experiments in this blog post by Piotr Szymański:

Simple interactions between processes

A few suggestions before you start:

• You might want to use the Linux machines to run these examples. If you use a laptop, don't try sending millions of messages.
• To start, use the module name Table as in the blog. When you get to the section Sending messages back and forth between processes put that code in a new module called Table2 and use that name in the tests that follow.
• In the section after we start the Observer using :observer.start Piotr suggests running 100 million processes. Don't. If you do too many sends, the process mailbox can get *very* full when the process can't keep up - my poor 4GB MacBook died. Rather, start small and build up to 1 million (this will still take some time). For example:

  p = Table.start
  1..100 |> Stream.map(fn _ -> send p, :ping end) |> Enum.count

• If you want to try stress-testing with 100 million processes, do it last…and on the Linux box, not a laptop.