Using ActiveRecord sessions causes loss of MySQL connection

Before jumping on the ActiveRecord bandwagon you might want to take a
look at this reference:
http://scott.elitists.net/sessions.html

Especially take a look at this graph:
http://scott.elitists.net/img/sessions.png

A MySQL AcitveRecord session store doesn't consistently beat the PStore
default until the number of sessions exceeds 10,000.

Aaron