puma.rb 1.7 KB

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  1. # This configuration file will be evaluated by Puma. The top-level methods that
  2. # are invoked here are part of Puma's configuration DSL. For more information
  3. # about methods provided by the DSL, see https://puma.io/puma/Puma/DSL.html.
  4. require_relative 'auto_tune'
  5. # Puma starts a configurable number of processes (workers) and each process
  6. # serves each request in a thread from an internal thread pool.
  7. #
  8. # The ideal number of threads per worker depends both on how much time the
  9. # application spends waiting for IO operations and on how much you wish to
  10. # to prioritize throughput over latency.
  11. #
  12. # As a rule of thumb, increasing the number of threads will increase how much
  13. # traffic a given process can handle (throughput), but due to CRuby's
  14. # Global VM Lock (GVL) it has diminishing returns and will degrade the
  15. # response time (latency) of the application.
  16. #
  17. # The default is set to 3 threads as it's deemed a decent compromise between
  18. # throughput and latency for the average Rails application.
  19. #
  20. # Any libraries that use a connection pool or another resource pool should
  21. # be configured to provide at least as many connections as the number of
  22. # threads. This includes Active Record's `pool` parameter in `database.yml`.
  23. threads_count = ENV.fetch("RAILS_MAX_THREADS", 3)
  24. threads threads_count, threads_count
  25. worker_timeout 3600 if ENV.fetch("RAILS_ENV", "development") == "development"
  26. # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
  27. port ENV.fetch("PORT", 3000)
  28. tuned_num_workers, tuned_num_threads = auto_tune
  29. workers tuned_num_workers
  30. # Allow puma to be restarted by `bin/rails restart` command.
  31. plugin :tmp_restart
  32. # Only use a pidfile when requested
  33. pidfile ENV["PIDFILE"] if ENV["PIDFILE"]