>> It's already in the docs, so if they read it and understand it they can
>> add it to the postgresql.conf if they so choose.
>
> I agree with Josh Berkus that vacuum_defer_cleanup_age should be in
> postgresql.conf. We don't stop listing items just because they are
> dangerous, e.g. fsync, or to discourage their use. I believe Greg Smith
> also felt it should be included.
Or, let's put it another way: I've made my opinion clear in the past
that I think that we ought to ship with a minimal postgresql.conf with
maybe 15 items in it. If we are going to continue to ship with
postgresql.conf "kitchen sick" version, however, it should include
vacuum_defer_cleanup_age.
-- -- Josh Berkus PostgreSQL Experts Inc.
http://www.pgexperts.com
