One of the easiest ways to improve your application’s performance is by putting a caching solution in front of your database. In this tutorial, I’ll show you how to use Memcached with Rails, Django, or Drupal.
 Memcached is an excellent choice for this problem, given its solid history, simple installation, and active community. It is used by companies big and small, and includes giants, such as Facebook, YouTube, and Twitter. The Memcached site, itself, does a good job of describing Memcached as a “Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.”