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47 lines
2.0 KiB
47 lines
2.0 KiB
# Puma can serve each request in a thread from an internal thread pool. |
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# The `threads` method setting takes two numbers a minimum and maximum. |
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# Any libraries that use thread pools should be configured to match |
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# the maximum value specified for Puma. Default is set to 5 threads for minimum |
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# and maximum, this matches the default thread size of Active Record. |
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# |
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threads_count = ENV.fetch("MAX_THREADS") { 5 }.to_i |
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threads threads_count, threads_count |
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# Specifies the `port` that Puma will listen on to receive requests, default is 3000. |
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# |
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port ENV.fetch("PORT") { 3000 } |
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# Specifies the `environment` that Puma will run in. |
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# |
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environment ENV.fetch("RAILS_ENV") { "development" } |
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# Specifies the number of `workers` to boot in clustered mode. |
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# Workers are forked webserver processes. If using threads and workers together |
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# the concurrency of the application would be max `threads` * `workers`. |
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# Workers do not work on JRuby or Windows (both of which do not support |
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# processes). |
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# |
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workers ENV.fetch("WEB_CONCURRENCY") { 2 } |
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# Use the `preload_app!` method when specifying a `workers` number. |
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# This directive tells Puma to first boot the application and load code |
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# before forking the application. This takes advantage of Copy On Write |
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# process behavior so workers use less memory. If you use this option |
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# you need to make sure to reconnect any threads in the `on_worker_boot` |
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# block. |
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# |
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# preload_app! |
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# The code in the `on_worker_boot` will be called if you are using |
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# clustered mode by specifying a number of `workers`. After each worker |
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# process is booted this block will be run, if you are using `preload_app!` |
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# option you will want to use this block to reconnect to any threads |
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# or connections that may have been created at application boot, Ruby |
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# cannot share connections between processes. |
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# |
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# on_worker_boot do |
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# ActiveRecord::Base.establish_connection if defined?(ActiveRecord) |
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# end |
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# Allow puma to be restarted by `rails restart` command. |
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plugin :tmp_restart
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