-* **memcache** (Boolean) - Use memcache. To use memcache the PECL extension "memcache" has to be installed and activated.
-* **memcache_host** - Hostname of the memcache daemon. Default is '127.0.0.1'.
-* **memcache_port** - Portnumber of the memcache daemon. Default is 11211.
+* **session_handler** (database|cache|native) - Whether to use Cache to store session data or to use PHP native session storage. Default value is `database`.
+* **cache_driver** (database|memcache|memcached) - Whether to use Memcache or Memcached to store temporary cache. Default value is `database`.
+* **memcache_host** - Host name of the memcache daemon. Default is '127.0.0.1'.
+* **memcache_port** - Port number of the memcache daemon. Default is 11211.
+* **memcached_hosts** - Array of Memcached servers info `[host, port(, weight)]`. Default value is `[['127.0.0.1', 11211]]`.