title: How do I debug random Timeout::Error: execution expired
body: <p>We are using Rails 2.3.5 and have been experiencing seemingly random Timeout::Error: execution expired errors.  The errors reported by Hoptoad are not consistently in any particular controller and show up everywhere from user sessions to account settings to some of our core functionality controllers.</p>
  
  <p>The vast majority of requests do not Timeout but there are enough to cause concern.</p>
  
  <p>Is this normal?  If so, what are some things to look at to decrease the occurance?  If not, has anyone run into this and what are some common problems that can trigger an error like this.</p>