title: Redis: Show database size/size for keys
body: <p>My redis instance seems to being growing very large and I'd like to find out which of the multiple databases I have in there consumes how much memory. Redis' <code>INFO</code> command just shows me the total size and the number of keys per database which doesn't give me much insight... So any tools/ideas that give me more information when monitoring the redis server would be appreciated.</p>
  
  <p>The Redis documentation doesn't show me any commands that can return the consumed memory of certain keys, so I guess if any buggy code would write a lot of "trash" to redis this could be really hard to find...</p>