Update Rails config

config/environments/production.rb

@@ -20,7 +20,7 @@ Gitlab::Application.configure do
   # Generate digests for assets URLs
   config.assets.digest = true
 
-  # Defaults to Rails.root.join("public/assets")
+  # Defaults to nil and saved in location specified by config.assets.prefix
   # config.assets.manifest = YOUR_PATH
 
   # Specifies the header that your server uses for sending files
@@ -33,8 +33,11 @@ Gitlab::Application.configure do
   # See everything in the log (default is :info)
   # config.log_level = :debug
 
+  # Prepend all log lines with the following tags
+  # config.log_tags = [ :subdomain, :uuid ]
+
   # Use a different logger for distributed setups
-  # config.logger = SyslogLogger.new
+  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production
   config.cache_store = :memory_store
@@ -58,6 +61,10 @@ Gitlab::Application.configure do
   # Send deprecation notices to registered listeners
   config.active_support.deprecation = :notify
 
+  # Log the query plan for queries taking more than this (works
+  # with SQLite, MySQL, and PostgreSQL)
+  # config.active_record.auto_explain_threshold_in_seconds = 0.5
+
   config.action_mailer.delivery_method = :sendmail
   # Defaults to:
   # # config.action_mailer.sendmail_settings = {