title: mysql not respecting wait_timeout setting in my.cnf
body: <p>I've set a wait_timeout in my.cnf and restarted the server, but the time on idle connections continues to grow larger than the default 100s I set. Any ideas why this is happening?</p>
  
  <p>PS: I'm running ubuntu 12.04 and Mysql Server 5.5. Using Rails 3 with the mysql2 gem.</p>
  
  <pre><code>mysql&gt; SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY TIME DESC LIMIT 20;
  +------+------------------+-------------------------------------+--------------------------+---------+------+-------+------+
  | ID   | USER             | HOST                                | DB                       | COMMAND | TIME | STATE | INFO |
  +------+------------------+-------------------------------------+--------------------------+---------+------+-------+------+
  
  |  760 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:45852 | x | Sleep   | 4202 |       | NULL |
  |  912 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:40929 | y  | Sleep   | 4194 |       | NULL |
  |  976 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:40970 | y  | Sleep   | 4193 |       | NULL |
  |  836 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:49903   | z | Sleep   | 4189 |       | NULL |
  | 1743 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:44585  | z | Sleep   | 4157 |       | NULL |
  | 1778 | user | ip-xxx-xxx-xxx-xxx.ec2.internal:48714    | a  | Sleep   | 4154 |       | NULL |
  </code></pre>