Caching is implemented using memcached server.  The application interacts with the memcached server using the Dalli client (https://github.com/mperham/dalli). 

On staging and production environment, caching is enabled. 

In case you need to use caching in the development environment as well, then make sure that in the config/environment/development.rb file, <code>config.action_controller.perform_caching = true </code>

 Also add the below two lines to development.rb
<code>
require 'active_support/cache/dalli_store23'
config.cache_store = :dalli_store
</code>

To clear the cache, run script/console and run the following command
<code>
Rails.clear.cache
</code>