phpMemcachedAdmin is the best tool to monitor the Memcached . This program allows to see in real-time (top-like) or from the start of the server, stats for get, set, delete, increment, decrement, evictions, reclaimed, cas command, as well as server stats (network, items, server version) with googlecharts and server internal configuration
The front view of phpMemcachedAdmin
How to configure phpMemcachedAdmin
On the top of the page you can see Edit Configuration tab, Just go there and you will get the following window.
Just add your server and click on save servers configuration tab.
You can also get a live status of your memcached servers .