This message temporarily blocked my web:

PDOException: SQLSTATE[42000]: Syntax error or access violation: 1226 User 'uxxxxxxx_name' has exceeded the 'max_questions' resource (current value: 108000) in lock_may_be_available() (line 164 of .../httpdocs/mydomain.com/includes/lock.inc).

I have read (in post of several years ago) that it is because of the limitations of a shared hosting, but my question is: What content causes so many queries to the database and why?:
- CMS Drupal?
- Any module?
- Any wrong code?

How can I now it?

I´m using Money Suite, MS Core, Membership Suite and Pay Per View Settings.

I have Devel module but I don't know how use it, very well.

Thanks,