puma 服务器死机

Question

I can not understand what the problem is. The app works perfectly after I start it. After a while of inactivity (around 5 min with no requests) the app stops responding when I send requests to it.

puma.rb:

threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }.to_i
threads threads_count, threads_count

port        ENV.fetch("PORT") { 3000 }

environment ENV.fetch("RAILS_ENV") { "development" }

plugin :tmp_restart

This is what I get when I do this: ps aux | grep puma ps aux | grep puma

user+ 4201 7.8 2.5 1197292 100560 ? Sl 15:41 0:04 puma 3.11.4 (tcp://0.0.0.0:3000) [backend]

user+ 4277 0.0 0.0 15476 1020 pts/20 S+ 15:42 0:00 grep --color=auto puma

ruby -v

ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-linux]

rails -v

Rails 5.1.6

OS Ubuntu 16.04 LTS

Answer 1

this is what your puma.rb should look like

workers Integer(ENV['WEB_CONCURRENCY'] || 2)
threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5)
threads threads_count, threads_count

preload_app!

rackup      DefaultRackup
port        ENV['PORT']     || 3000
environment ENV['RACK_ENV'] || 'development'

on_worker_boot do
  ActiveRecord::Base.establish_connection
end