Phoenix (elixir) highload optimization

highload phoenix framework optimization

config :hlcup, HlcupWeb.Endpoint,
  # https://hexdocs.pm/phoenix/endpoint.html => ctrl-f => load_from_system_env
  # Let's see from my app Endpont (HlcupWeb.Endpoint)
 
   # def init(_key, config) do
   #   if config[:load_from_system_env] do
   #     port = System.get_env("PORT") || raise "expected the PORT environment variable to be set"
   #     {:ok, Keyword.put(config, :http, [:inet6, port: port])}
   #   else
   #     {:ok, config}
   #   end
   # end
 
 # if load_from_system_env is true => http options don't use.
 load_from_system_env: false,
  
  # https://hexdocs.pm/plug/Plug.Adapters.Cowboy.html
  http: [
    ip: {0,0,0,0},
    port: 80,
    acceptors: 2500,
    max_connections: :infinity,
    timeout: 2000,
    # https://ninenines.eu/docs/en/cowboy/1.0/manual/cowboy_protocol/
    protocol_options: [{:max_keepalive, 20000000},{:timeout, 2000}]
  ],
  url: [host: "travels.com", port: 80],
  cache_static_manifest: "priv/static/cache_manifest.json",
  server: true,
  root: ".",
  version: Application.spec(:hlcup, :vsn)

# remove any unimportant logger function output from code at compilation
config :logger, level: :error, compile_time_purge_level: :error

OTP

# Move erts IO Polling to dedicated threads
# https://github.com/erlang/otp/pull/1552

phoenix => debug current phoenix settings

> :inet.i()
> Application.get_env(:hlcup, HlcupWeb.Endpoint)
> :ets.lookup(:"Elixir.HlcupWeb.Endpoint", :http)
> :erlang.system_info(:process_limit)
> :erlang.system_info(:port_limit)

phoenix => Distillery release optimization

# https://github.com/bitwalker/distillery/blob/master/docs/Walkthrough.md

$ MIX_ENV=prod mix release --erl="+K true +stbt db" --env=prod --verbose

Replace Cowboy

# https://github.com/knutin/elli

# Not Sure for this
# https://github.com/zampino/pastelli
# https://github.com/zampino/pastelli_phoenix

Replace Poison (if you work with json)

# Use phoenix_jiffy instead of Poison - it's faster!
# https://hex.pm/packages/phoenix_jiffy