workers Integer(ENV['WEB_CONCURRENCY'] || 2) 
threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5) 
threads threads_count, threads_count

preload_app!

rackup DefaultRackup
port ENV['PORT'] || 3000 
environment ENV['RACK_ENV'] || 'development'

on_worker_boot do
# Worker specific setup for Rails 4.1+
# See: https://devcenter.heroku.com/articles/
# deploying-rails-applications-with-the-puma-web-server#on-worker-boot ActiveRecord::Base.establish_connection
end