The WebSocket architecture of @elixirphoenix
#myelixirstatus 1. The endpoint will start several children, we only focus on server and socket here:

* socket children

pool supervisor + a bunch of dynamic supervisors which will eventually start channel servers

the number of dynamic supervisors is the number of CPU cores of your server

Phoenix.PubSub is probably the most important component in @elixirphoenix @elixirlang .
We will benefit a lot by understanding the internals of Phoenix.PubSub.

#myelixirstatus
Here is the basic structure: * a :pg server is started with the scope name: Pheonix.PubSub
* a pubsub supervisor supervises a registry and an adapter server
* the adapter server joins a :pg group during initialization