title: even small file upload stops activity on apache/rails
body: <p>on my rails(2.3.5) app(currently 50-70rpm, maximum response time around 0.7s), uploading even 700k file(using paperclip plugin) locks up the server for web requests for everyone for 2 minutes! (other apps on same server work normally)</p>
  
  <p>does anyone have a clue why that might be happening? i am using some mysql transactions which lock the database also if that might be an issue</p>
  
  <p>i read <a href="http://www.therailsway.com/2009/4/23/uploading-files" rel="nofollow noreferrer">http://www.therailsway.com/2009/4/23/uploading-files</a>
  but it couldn't be locking server for 2 minutes for a small file, could it?!</p>