Sudden MySql Errors

[MajorFm.com]

Im not sure what is going on but suddenly on one sub-forum only i now get the following error:

Warning: mysql_query(): Unable to save result set in /includes/class_core.php on line 354

The forum was fine before, this has only been happening today...

Someone please tell me whats going on, there are no hacks, i re-uploaded all files to see if that would fix it, still no joy...

Please advise

[Steve Machol]

Which version of vB and have you disabled plugins in config.php?

[MajorFm.com]

3.6.0 where is the option to disable plugins? i dont see it in config.php

it also sometimes shows me this:

Database error in vBulletin 3.6.0:
Invalid SQL:
SELECT COUNT(*) AS threads, SUM(IF(thread.lastpost >= 1171223473 AND open <> 10, 1, 0)) AS newthread

FROM thread AS thread


WHERE forumid = 8
AND sticky = 0
AND visible IN (0,1,2);
MySQL Error : Got error 134 from table handler
Error Number : 1030

[Steve Machol]

MySQL error: 134 = Record was already deleted (or record file crashed)

To fix this run Repair/Optimize in the Admin CP. You may need to run it more than once to fix all
errors:

Admin CP -> Maintenance -> Repair/Optimize Tables -> Check All -> Continue

If you cannot access the Admin CP you can also use phpMyAdmin to repair tables.

To disable plugins, edit config.php and add this line right under <?php

define('DISABLE_HOOKS', true);

[MajorFm.com]

whoo hoo, fixed it, why would this happen? strange, thank you so much for your help, your a star yet again!