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 # 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 # You can control the number of workers using ENV["WEB_CONCURRENCY"]. You 9 # should only set this value when you want to run 2 or more workers. The 10 # default is already 1. 11 # 12 # The ideal number of threads per worker depends both on how much time the 13 # application spends waiting for IO operations and on how much you wish to 14 # prioritize throughput over latency. 15 # 16 # As a rule of thumb, increasing the number of threads will increase how much 17 # traffic a given process can handle (throughput), but due to CRuby's 18 # Global VM Lock (GVL) it has diminishing returns and will degrade the 19 # response time (latency) of the application. 20 # 21 # The default is set to 3 threads as it's deemed a decent compromise between 22 # throughput and latency for the average Rails application. 23 # 24 # Any libraries that use a connection pool or another resource pool should 25 # be configured to provide at least as many connections as the number of 26 # threads. This includes Active Record's `pool` parameter in `database.yml`. 27 threads_count = ENV.fetch("RAILS_MAX_THREADS", 3) 28 threads threads_count, threads_count 29 30 # Specifies the `port` that Puma will listen on to receive requests; default is 3000. 31 port ENV.fetch("PORT", 3000) 32 33 # Allow puma to be restarted by `bin/rails restart` command. 34 plugin :tmp_restart 35 36 # Run the Solid Queue supervisor inside of Puma for single-server deployments 37 plugin :solid_queue if ENV["SOLID_QUEUE_IN_PUMA"] 38 39 # Specify the PID file. Defaults to tmp/pids/server.pid in development. 40 # In other environments, only set the PID file if requested. 41 pidfile ENV["PIDFILE"] if ENV["PIDFILE"] 42