i am also getting the same error message :
WordPress database error: [User '???????' has exceeded the 'max_questions' resource (current value: 50000)]
i contacted my host and they said it's because (not sure of technicalities but) the max number of permissible queries per user is set to 50 000 per hour. once it reaches this limit, it blocks any more queries until the hour is up then it is reset.
the problem with my site is, that every so often my site just displays a very basic page, no posts, etc. when i try and login, i find that there is no database. if i go to phpmyadmin, all the data is in the database but wordpress just does not see it. i then delete the database and load up my backup. then when i try and access my website, i get the 50 000 error. my questions are, is the "dissapearance" of my database (as far as wordpress is concerned) because of the 50 000 error? secondly, i assume that the 50 000 is actually 50 000 queries sent to the databse in 1 hour - if this is the case, then it must mean that spiders, robots and other "automatic" accesses are made to my website, causing this high database query? if this is the case, how do i stop this?
much appreciate any help in this regard.