The Memcached system is used by some of the most traffic heavy sites such as YouTube, Facebook, Twitter.
It is also supported by some popular CMSs such as Drupal, Joomla, and WordPress.
To use Memcached with PHP, please enable memcached extension from the control panel at Advanced -> PHP Settings -> Edit php.ini -> memcached On.
To have Memcached enabled your plan needs to have Memcached instances available. In case you need to add one or more, you can purchase it as an upgrade from the Add/Upgrade service(s) section in the hosting control panel.
Each instance goes with 16 MB of memory which is why the Memcached instances go with Memcached memory.
Important: many applications require host and port to link them with Memcached. On our system the Memcached works on a Socket instead of Port.
In this case you need to use
Memcached hostname(IP): unix:///home/sys/memcached.sock
Memcached Port: 0
Example: $memcached->addServer(‘unix:///home/sys/memcached.sock’, 0);