title: Memcached eviction prior to key expiry?
body: <p>Can a key/value pair stored in memcached get evicted prior to its expiry if there is still free space available?</p>
  
  <p>I have a memcached process running that is allowed to consume up to 6GB; 2.5GB are reported in use and that number fluctuates only minimally (+/- 100MB in a one-day span). If I set a simple string value that expiries in 15 minutes, is it possible that it would be evicted (cache.get returns not found) prior to 15 minutes elapsing?</p>
  
  <p>Thanks,
  -Eric</p>