mysql sessions vs flat file?

Hello all, Has anyone had an experience with storing sessions in mysql (or sqlite)? If so, what if any are the performance benefits? Obviously, there would have to be an extra db query per page... but would that be faster then opening a text file? Also, I was trying to post to the php news server, but my messages weren't showing up. Is it read only? Or just slow? Cheers, -J -- Vendorama http://www.vendorama.com The evolution of e-commerce