We recently upgraded mysql database which is running on mysql server version 5.5.8. After the upgrade sometimes we are seeing the simple upgrade staements taking more than 10 seconds. And when i looked at the processlist it shows that all of them are in "query end" state. Does any body has any idea on this.

```
 UPDATE Accounts SET IPadd = 'xx.xx.xx.xx', updatedtime = NULL WHERE Id=xx;

```