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@pcreux /Gemfile
Last active Nov 14, 2017

What would you like to do?
Fast Rails + Heroku Configuration

Free addons!

heroku addons:add memcachier
heroku addons:add mandrill:starter
heroku addons:add newrelic
heroku addons:add pgbackups:auto-month
heroku addons:add papertrail
group :production do
gem 'unicorn'
# Enable gzip compression on heroku, but don't compress images.
gem 'heroku-deflater'
# Heroku injects it if it's not in there already
gem 'rails_12factor'
gem 'memcachier'
gem 'dalli'
# Fast IO for memcache
gem 'kgio'
# Serve static assets through Rack + Memcache
gem 'rack-cache'
web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
# config/environments/production.rb
# ...
# Enable Rails's static asset server for Heroku
config.serve_static_assets = true
# Set static assets cache header. rack-cache will cache those.
config.static_cache_control = "public, max-age=31536000"
config.cache_store = :dalli_store
:value_max_bytes => 10485760,
:expires_in => 86400) # 1 day
# Configure rack-cache for using memcachier
config.action_dispatch.rack_cache = {
:metastore => client,
:entitystore => client
# Send emails via mandrill
ActionMailer::Base.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => '',
:port => '587',
:authentication => :plain,
:user_name => ENV['MANDRILL_USERNAME'],
:password => ENV['MANDRILL_APIKEY'],
:domain => '',
# ...
# config/unicorn.rb
worker_processes 3
timeout 30
preload_app true
before_fork do |server, worker|
# Replace with MongoDB or whatever
if defined?(ActiveRecord::Base)
ActiveRecord::Base.connection.disconnect!'Disconnected from ActiveRecord')
# If you are using Redis but not Resque, change this
if defined?(Resque)
Resque.redis.quit'Disconnected from Redis')
sleep 1
after_fork do |server, worker|
# Replace with MongoDB or whatever
if defined?(ActiveRecord::Base)
ActiveRecord::Base.establish_connection'Connected to ActiveRecord')
# If you are using Redis but not Resque, change this
if defined?(Resque)
Resque.redis = ENV['REDIS_URI']'Connected to Redis')

Awesome thanks !

Some suggestions:

  • sucker_punch (to avoir using workers for just emails)
  • add a comment on new relic regarding the monitoring feature to keep the app online without using external services

boriscy commented Nov 28, 2013

sucker_punch is great but one must be really carefull if you aren't using ruby 2.0.

Can't precompile assets: undefined methodday' for 1:Fixnumexpires_in` takes the "default TTL in seconds if you do not pass TTL as a parameter to an individual operation, defaults to 0 or forever" [source:]
If it's 1 day you want then value should be 86400

                             :value_max_bytes => 10485760,
                             :expires_in => 86400)

croaky commented Nov 30, 2013

These settings, minus Memcache, are in Suspenders. I prefer fronting my Heroku apps with Fastly to Memcache for the fastest static asset serving that only hits the Heroku dynos once per cache via origin pull.

You can change the Sendgrid by the Mandrill. In the free plan, they have the double of emails.


pcreux commented Feb 22, 2014

@mathieugagne Thanks! I just fixed it!


pcreux commented Feb 22, 2014

@maurogeorge Done!


pcreux commented Feb 22, 2014

@croaky Fastly charges a minimum of $50 a month right?

Could use a gem 'newrelic' line in the Gemfile. I added the addon but missed the gem, and was wondering why Newrelic was "waiting on data" 😁

do u need to have workers?

The command is now heroku addons:create instead of heroku addons:add

Also, heroku addons:add pgbackups:auto-month doesn't exist. The only postgres backup system I see now is heroku addons:create autobus

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