Hannu Krosing <hannu(at)skype(dot)net> writes:
> If I'm desperate enough to get the 2x reduction of WAL writes, I may
> even write my own backup solution.
Given Florian's concern, sounds like you might have to write your own
kernel too. In which case, generating a variant build of Postgres
that allows full_page_writes to be disabled is certainly not beyond
your powers. But for the ordinary mortal DBA, I think this combination
is just too unsafe to even consider.
regards, tom lane