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56 lines
2.3 KiB
Ruby
56 lines
2.3 KiB
Ruby
# This configuration file will be evaluated by Puma. The top-level methods that
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# are invoked here are part of Puma's configuration DSL. For more information
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# about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
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rails_env = ENV.fetch("RAILS_ENV", "development")
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# Puma starts a configurable number of processes (workers) and each process
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# serves each request in a thread from an internal thread pool.
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#
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# The ideal number of threads per worker depends both on how much time the
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# application spends waiting for IO operations and on how much you wish to
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# to prioritize throughput over latency.
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#
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# As a rule of thumb, increasing the number of threads will increase how much
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# traffic a given process can handle (throughput), but due to CRuby's
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# Global VM Lock (GVL) it has diminishing returns and will degrade the
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# response time (latency) of the application.
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#
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# The default is set to 3 threads as it's deemed a decent compromise between
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# throughput and latency for the average Rails application.
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#
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# Any libraries that use a connection pool or another resource pool should
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# be configured to provide at least as many connections as the number of
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# threads. This includes Active Record's `pool` parameter in `database.yml`.
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threads_count = ENV.fetch("RAILS_MAX_THREADS") { 3 }
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threads threads_count, threads_count
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if rails_env == "production"
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# If you are running more than 1 thread per process, the workers count
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# should be equal to the number of processors (CPU cores) in production.
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#
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# It defaults to 1 because it's impossible to reliably detect how many
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# CPU cores are available. Make sure to set the `WEB_CONCURRENCY` environment
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# variable to match the number of processors.
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workers_count = Integer(ENV.fetch("WEB_CONCURRENCY") { 1 })
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workers workers_count if workers_count > 1
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preload_app!
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end
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# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
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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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environment rails_env
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# Allow puma to be restarted by `bin/rails restart` command.
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plugin :tmp_restart
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pidfile ENV["PIDFILE"] if ENV["PIDFILE"]
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if rails_env == "development"
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# Specifies a very generous `worker_timeout` so that the worker
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# isn't killed by Puma when suspended by a debugger.
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worker_timeout 3600
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end
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