Heroku，Puma，Redis，Sidekiq和Connection Limits，ERR最大客户数达到

Question

我正在使用heroku，puma，redis和sidekiq一起去。当我尝试执行一些后台工作时，正在抛出Your Redis connection pool is too small for Sidekiq to work. Your pool has 20 connections but really needs to have at least 22

请查看以下配置文件，请帮我找到解决方案

我正在使用

Redis To Go实例：迷你

procfile

web: bundle exec puma -C config/puma.rb  
worker: bundle exec sidekiq -C config/sidekiq.yml 

puma.rb

workers Integer(ENV['WEB_CONCURRENCY'] || 2)  
threads_count = Integer(ENV['MAX_THREADS'] || 1)  
threads threads_count, threads_count

preload_app!

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

# Because we are using preload_app, an instance of our app is created by master process (calling our initializers) and then memory space
# is forked. So we should close DB connection in the master process to avoid connection leaks.
# https://github.com/puma/puma/issues/303
# http://stackoverflow.com/questions/17903689/puma-cluster-configuration-on-heroku
# http://www.rubydoc.info/gems/puma/2.14.0/Puma%2FDSL%3Abefore_fork
# Dont have to worry about Sidekiq's connection to Redis because connections are only created when needed. As long as we are not
# queuing workers when rails is booting, there will be no redis connections to disconnect, so it should be fine.
before_fork do  
  puts "Puma master process about to fork. Closing existing Active record connections."
  ActiveRecord::Base.connection.disconnect!
end

on_worker_boot do  
  # Worker specific setup for Rails 4.1+
  # See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
  ActiveRecord::Base.establish_connection
end 

在sidekiq.yml

development:  
  :concurrency: 5
production:  
  :concurrency: 20
:queues:
  - default

sidekiq.rb

Sidekiq.configure_client do |config|
  config.redis = { url: ENV['REDISTOGO_URL'], size: 2 }
end

Sidekiq.configure_server do |config|
  config.redis = { url: ENV['REDISTOGO_URL'], size: 20 }

  Rails.application.config.after_initialize do
    Rails.logger.info("DB Connection Pool size for Sidekiq Server before disconnect is: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}")
    ActiveRecord::Base.connection_pool.disconnect!

    ActiveSupport.on_load(:active_record) do
      config = Rails.application.config.database_configuration[Rails.env]
      config['reaping_frequency'] = ENV['DATABASE_REAP_FREQ'] || 10 # seconds
      # config['pool'] = ENV['WORKER_DB_POOL_SIZE'] || `
      config['pool'] = 16
      ActiveRecord::Base.establish_connection(config)

      Rails.logger.info("DB Connection Pool size for Sidekiq Server is now: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}")
    end
  end
end

部署此配置后，它会抛出以下错误，

您的Redis连接池太小，无法让Sidekiq工作。你的游泳池有20个连接，但确实需要至少22个

稍后我在sidkiq.rb中更新了以下详细信息，

Sidekiq.configure_client do |config|
  config.redis = { url: ENV['REDISTOGO_URL'], size: 2 }
end

Sidekiq.configure_server do |config|
  config.redis = { url: ENV['REDISTOGO_URL'], size: 22 }

  Rails.application.config.after_initialize do
    Rails.logger.info("DB Connection Pool size for Sidekiq Server before disconnect is: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}")
    ActiveRecord::Base.connection_pool.disconnect!

    ActiveSupport.on_load(:active_record) do
      config = Rails.application.config.database_configuration[Rails.env]
      config['reaping_frequency'] = ENV['DATABASE_REAP_FREQ'] || 10 # seconds
      # config['pool'] = ENV['WORKER_DB_POOL_SIZE'] || `
      config['pool'] = 16
      ActiveRecord::Base.establish_connection(config)

      Rails.logger.info("DB Connection Pool size for Sidekiq Server is now: #{ActiveRecord::Base.connection.pool.instance_variable_get('@size')}")
    end
  end
end

这次又引发了另一个问题

ERR达到的最大客户数

我只是在制作中遇到这个问题，请帮帮我