Memcache-top - perl command-line memcached stat reporter, top-like output

I am not familiar with memcached and my knowledge about memcached is limited to Wikipedia. Having said that, is it fair to say that if you use SSD instead of HDD, you don't need memcached for improved performance?

In Rails we just have a page that prints out CACHE.stats.

Amnesia is kinda slick, and works well: <a href="http://github.com/benschwarz/amnesia" rel="nofollow">http://github.com/benschwarz/amnesia</a>

Any references on how to read/interpret this results?