1# Puma can serve each request in a thread from an internal thread pool.
 2# The `threads` method setting takes two numbers a minimum and maximum.
 3# Any libraries that use thread pools should be configured to match
 4# the maximum value specified for Puma. Default is set to 5 threads for minimum
 5# and maximum, this matches the default thread size of Active Record.
 6#
 7threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }.to_i
 8threads threads_count, threads_count
 9
10# Specifies the `port` that Puma will listen on to receive requests, default is 3000.
11#
12port        ENV.fetch("PORT") { 3000 }
13
14# Specifies the `environment` that Puma will run in.
15#
16environment ENV.fetch("RAILS_ENV") { "development" }
17
18# Specifies the number of `workers` to boot in clustered mode.
19# Workers are forked webserver processes. If using threads and workers together
20# the concurrency of the application would be max `threads` * `workers`.
21# Workers do not work on JRuby or Windows (both of which do not support
22# processes).
23#
24workers ENV.fetch("WEB_CONCURRENCY") { 2 }
25
26# Use the `preload_app!` method when specifying a `workers` number.
27# This directive tells Puma to first boot the application and load code
28# before forking the application. This takes advantage of Copy On Write
29# process behavior so workers use less memory. If you use this option
30# you need to make sure to reconnect any threads in the `on_worker_boot`
31# block.
32#
33preload_app!
34
35# The code in the `on_worker_boot` will be called if you are using
36# clustered mode by specifying a number of `workers`. After each worker
37# process is booted this block will be run, if you are using `preload_app!`
38# option you will want to use this block to reconnect to any threads
39# or connections that may have been created at application boot, Ruby
40# cannot share connections between processes.
41#
42on_worker_boot do
43  ActiveRecord::Base.establish_connection if defined?(ActiveRecord)
44end
45
46# Allow puma to be restarted by `rails restart` command.
47plugin :tmp_restart