bayes error in maillog

Has anyone else seen the following error in their maillog? bayes: cannot open bayes databases /root/.spamassassin/bayes_* R/W: lock failed: Interrupted system call

spampd performance on a relay mail server

Is anyone out there using spampd? I've been trying to setup a Spamassassin relay mail server and I'm really having performance issues. Our incoming MTA is averaging about 3 message per second. I would think that Spamassassin could keep up with that just fine. Is anyone else having problems with