55 lines
2.2 KiB
Ruby
55 lines
2.2 KiB
Ruby
# 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("RAILS_MAX_THREADS") { 1 }
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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") { 8 }
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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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# If you are preloading your application and using Active Record, it's
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# recommended that you close any connections to the database before workers
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# are forked to prevent connection leakage.
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#
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before_fork do
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ActiveRecord::Base.connection_pool.disconnect! if defined?(ActiveRecord)
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end
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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 the `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, as 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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