title: Doctrine 2 Close Connection
body: <p>I use doctrine 2 PDO with mysql.</p>
  
  <p>When stress testing the server, mysql reports a lot of aborted connections (up-to 20%).</p>
  
  <p>I am trying to locate the issue.</p>
  
  <p>Mysql manual suggests to ensure that connections to the database are closed properly.
  <a href="http://dev.mysql.com/doc/refman/5.0/en/communication-errors.html">http://dev.mysql.com/doc/refman/5.0/en/communication-errors.html</a></p>
  
  <p>I can't find any information if doctrine actually closes connections or not, or uses persistent connections.</p>
  
  <p>Also, is there anything else that can account for aborted connections? I am at loss here.</p>
  
  <p>PS. Server is ubuntu 10.04, nginx 1.x, php 5.3.5 (fpm) and mysql 5.1.41</p>