Peter,
> I wonder, is anyone really running in production with full_page_writes
> off?
We're doing so with clients on Joyent (ZFS). And also for "ephemeral"
postgres instances -- ones where we've also turned off fsync.
It's also quite reasonable to assume that future filesystems will also
be able to make better torn page guarantees.
So it should remain a setting. I see no reason why it should be a
SIGHUP setting, though, if there's any code maintenance required to
support it -- frankly, I only change this setting at first system
deployment.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
