» memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
This extension uses the libmemcached library to provide an API for communicating with memcached servers. It also provides a session handler (memcached).
Information about libmemcached can be found at » http://libmemcached.org/libMemcached.html.