added info and sample commented config to config.ru

config.ru

@@ -1,6 +1,20 @@
 # This file is used by Rack-based servers to start the application.
 
+# ---------------------
+# Unicorn unicorn-worker-killer gem config (must be before the environment require)
+# @see https://github.com/kzk/unicorn-worker-killer
+
+#require 'unicorn/worker_killer'
+
+# Max requests per worker. Uncomment last parameter for verbosity (at unicorn log)
+
+#use Unicorn::WorkerKiller::MaxRequests, 3072, 4096 #, true
+
+# Max memory size (RSS) per worker. Uncomment last parameter for verbosity (at unicorn log)
+
+#use Unicorn::WorkerKiller::Oom, (500*(1024**2)), (600*(1024**2)) #, true
+
+# ---------------------
+
 require ::File.expand_path('../config/environment',  __FILE__)
 run CartoDB::Application
-
-# For specifics about Unicorn worker killer config to set here, check https://github.com/kzk/unicorn-worker-killer