PHP memcached session not working-open source projects php-memcached-dev/php-memcached

I started to use memcached for storing session files, but Session doesn’t work and apache sends response too slow. How can I solve the problem?

Modifications in php.in are:

;session.save_handler = files
session.save_handler = memcached
session.save_path = "tcp://127.0.0.1:11211?persistent=1&weight=1&timeout=1&retry_interval=15"