config/puma/production.rb
# frozen_string_literal: true
# Puma can serve each request in a thread from an internal thread pool.
# The `threads` method setting takes two numbers: a minimum and maximum.
# Any libraries that use thread pools should be configured to match
# the maximum value specified for Puma. Default is set to 5 threads for minimum
# and maximum; this matches the default thread size of Active Record.
#
# max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
# min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
# threads min_threads_count, max_threads_count
# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
#
# port ENV.fetch("PORT") { 3000 }
# Specifies the `environment` that Puma will run in.
#
# environment ENV.fetch("RAILS_ENV") { "development" }
# Specifies the `pidfile` that Puma will use.
# pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
# Specifies the number of `workers` to boot in clustered mode.
# Workers are forked web server processes. If using threads and workers together
# the concurrency of the application would be max `threads` * `workers`.
# Workers do not work on JRuby or Windows (both of which do not support
# processes).
#
# workers ENV.fetch("WEB_CONCURRENCY") { 2 }
# Use the `preload_app!` method when specifying a `workers` number.
# This directive tells Puma to first boot the application and load code
# before forking the application. This takes advantage of Copy On Write
# process behavior so workers use less memory.
#
# preload_app!
# Allow puma to be restarted by `rails restart` command.
# plugin :tmp_restart
# basic config recommended for use on heroku
#
workers_count = Integer(ENV.fetch('WEB_CONCURRENCY', 2))
threads_count = Integer(ENV.fetch('RAILS_MAX_THREADS', 5))
workers workers_count
threads threads_count, threads_count
preload_app!
port ENV.fetch('PORT', 3000)
environment 'production'
pidfile ENV.fetch('PIDFILE', 'tmp/pids/server.pid')
# Allow puma to be restarted by `rails restart` command.
plugin :tmp_restart
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 if defined?(ActiveRecord)
end
on_restart do
ActiveRecord::Base.connection.disconnect! if defined?(ActiveRecord::Base)
end