vacuum to cleanup transaction wrap around

All,
have a cluster that hit the wrap-around issue.
We are trying to run the backend vacuum as describe in the manual to
clear up the problem.

I not sure how I should be interrupting the messages I'm receiving
from the vacuum command.
Here is the approach I take so far (note pg 8.1.4 Linux 64bit)
from command line run postgres dbname
at the backend prompt run vacuum
the console spits out the following repeated many times
2007-03-23 08:51:00 MDTWARNING: database "preR14" must be vacuumed
within 999134 transactions
2007-03-23 08:51:00 MDTHINT: To avoid a database shutdown, execute a
full-database VACUUM in "preR14".

There are a few databases in this cluster ( about 6)

Any suggestions would be greatly appreciated.

Warren Little
Chief Technology Officer
Meridias Capital Inc
ph 866.369.7763