in reply to Apache::DBI, DBI, DBD::MySql and MySQL cache?

Are you sure you're not having any problems with mis-used package globals in your script? This, to me, sounds more like a mod_perl error and less like a MySQL error. I've never run into this type of behavior due to MySQL, but I have run into it when I was first learning mod_perl and using package globals.

-Any sufficiently advanced technology is
indistinguishable from doubletalk.