On 03.06.2011 22:16, Bruce Momjian wrote:
> I realize we just read the pages from the kernel to maintain sequential
> I/O, but do we actually read the contents of the page if we know it
> doesn't need vacuuming?
Yes.
> If so, do we need to?
Not necessarily, but it allows us to freeze old tuples, and doesn't cost
much anyway.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com