change cache files sites

config/environments/production.rb

@@ -18,7 +18,7 @@ RedmineApp::Application.configure do
 
   # Full error reports are disabled and caching is turned on
   config.action_controller.perform_caching = true
-
+  config.cache_store = :file_store,  "#{Rails.root }/public/tmp/"
   # Enable serving of images, stylesheets, and javascripts from an asset server
   # config.action_controller.asset_host                  = "http://assets.example.com"