the lines just below already preload

Gemfile

@@ -36,6 +36,8 @@ gem 'netaddr'
 gem 'jemalloc'
 gem 'customerio'
 
+gem 'newrelic_rpm'
+
 group :development, :test do
   gem 'travis-migrations', github: 'travis-ci/travis-migrations'
 end

Gemfile.lock

@@ -228,6 +228,7 @@ GEM
     net-http-persistent (2.9.4)
     net-http-pipeline (1.0.1)
     netaddr (1.5.1)
+    newrelic_rpm (3.16.0.318)
     os (0.9.6)
     pg (0.18.4)
     proxies (0.2.1)
@@ -366,6 +367,7 @@ DEPENDENCIES
   mocha (~> 0.12)
   mustermann!
   netaddr
+  newrelic_rpm
   pry
   rack-attack (= 5.0.0.beta1)
   rack-cache!

config.ru

@@ -15,4 +15,8 @@ skip   = ['Travis::Memory', 'GH::ResponseWrapper', 'Travis::Helpers::Legacy', 'G
   target.load_constants! :only => only, :skip => skip, :debug => false
 end
 
+require 'newrelic_rpm'
+::NewRelic::Agent.manual_start(config_path: 'config/newrelic.yml')
+::NewRelic::Agent.after_fork(force_reconnect: true)
+
 run Travis::Api::App.new

config/newrelic.yml

@@ -0,0 +1,45 @@
+#
+# This file configures the New Relic Agent.  New Relic monitors Ruby, Java,
+# .NET, PHP, Python and Node applications with deep visibility and low
+# overhead.  For more information, visit www.newrelic.com.
+#
+# Generated August 14, 2016
+#
+# This configuration file is custom generated for app6599903@heroku.com
+#
+# For full documentation of agent configuration options, please refer to
+# https://docs.newrelic.com/docs/agents/ruby-agent/installation-configuration/ruby-agent-configuration
+
+common: &default_settings
+
+  # Your application name. Renaming here affects where data displays in New
+  # Relic.  For more details, see https://docs.newrelic.com/docs/apm/new-relic-apm/maintenance/renaming-applications
+  app_name: Travis API Production
+
+  # To disable the agent regardless of other settings, uncomment the following:
+  # agent_enabled: false
+
+  # Logging level for log/newrelic_agent.log
+  log_level: info
+
+
+# Environment-specific settings are in this section.
+# RAILS_ENV or RACK_ENV (as appropriate) is used to determine the environment.
+# If your application has other named environments, configure them here.
+development:
+  <<: *default_settings
+  app_name: Travis API (Development)
+  log_level: debug
+
+test:
+  <<: *default_settings
+  # It doesn't make sense to report to New Relic from automated test runs.
+  monitor_mode: false
+
+staging:
+  <<: *default_settings
+  app_name: Travis API (Staging)
+  log_level: debug
+
+production:
+  <<: *default_settings

lib/travis/api/app.rb

@@ -27,6 +27,7 @@ require 'metriks/librato_metrics_reporter'
 require 'travis/support/log_subscriber/active_record_metrics'
 require 'fileutils'
 require 'securerandom'
+require 'newrelic_rpm'
 
 module Travis::Api
 end

lib/travis/api/app/base.rb

@@ -3,6 +3,7 @@ require 'mustermann'
 require 'travis/api/app'
 require 'travis/api/app/extensions'
 require 'travis/api/app/helpers'
+require 'newrelic_rpm'
 
 class Travis::Api::App
   # Superclass for any endpoint and middleware.