Drupal's fantastically complete logging caused me to check on it once again in order to respond to an associated request. I did this:
tail -f /m1/mysql/logs/mysql.log
to watch stuff go by (you can pipe out to grep <db_name> to limit the spew that comes out).
Just for the sake of interest, loading a Drupal page generates ~5MB of log, and 2 minutes on the site generates a total of ~17MB - including the initial 5MB load. So, after loading the page, the CMS seems to create approximately 6MB of logs/minute.