> If you want "synchronous replication" because you want "query
> availabilty" while making sure you're not getting "stale" queries from
> all your slaves, than using your k < N (k = 3 and N - 10) situation is
> screwing your self.
Correct. If that is your reason for synch standby, then you should be
using k = N configuration.
However, some people are willing to sacrifice consistency for durability
and availability. We should give them that option (eventually), since
among that triad you can never have more than two.
-- -- Josh Berkus PostgreSQL Experts Inc.
http://www.pgexperts.com