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