
Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering. Memcached is simple yet powerful. Its simple design promotes quick deployment, ease of development, and solves many problems facing large data caches. from memcached.org
Install Memcache
step 1: apt-get install memcached
step 2: service apache2 restart
step 3: apt-get install memcache
step 4: service apache2 restart
step 5: apt-get install php5-memcached
step 6: service apache2 restart
step 7: apt-get install php5-memcache
step 8: service apache2 restart