1workers Integer(ENV['PUMA_WORKERS'] || 3)
 2threads Integer(ENV['MIN_THREADS']  || 1), Integer(ENV['MAX_THREADS'] || 16)
 3
 4preload_app!
 5
 6rackup      DefaultRackup
 7port        ENV['PORT']     || 3000
 8environment ENV['RACK_ENV'] || 'development'
 9
10on_worker_boot do
11  # worker specific setup
12  ActiveSupport.on_load(:active_record) do
13    config = ActiveRecord::Base.configurations[Rails.env] || Rails.application.config.database_configuration[Rails.env]
14    config['pool'] = ENV['MAX_THREADS'] || 16
15    ActiveRecord::Base.establish_connection(config)
16  end
17end