Hello, I have hundred of trolls in my site since some time. I realized this too late! so yesterday I started using the Spam cleaner to delete some users and I also removed tons off-topic threads and posts. They are following each other so I think this may be causing problems. Now I have problems even trying to delete a simple thread or message; when I try to use the spam cleaner I get this: Code: Zend_Db_Statement_Mysqli_Exception: Mysqli statement execute error : Query execution was interrupted - library/Zend/Db/Statement/Mysqli.php:214 I tried to modify the my.cnf file without success. I'm running XenForo 1.1.2 with no plugins activated, no outdated templates. It happens in several browsers (chrome, firefox) in GNU/Linux and Windows 7. I can't even rebuild the user cache, it gets stuck at this: An error occurred or the request was stopped. I tried to restart mysql and the server and it doesn't help. I'm desesperated. Please, could you help me? --- UPDATE finally I managed to rebuild caches one by one.