On Wed, Apr 22, 2015 at 12:02 AM, Andres Freund <and...@anarazel.de> wrote: > On 2015-04-21 23:59:45 +0900, Sawada Masahiko wrote: >> The page as frozen could have the dead tuple for now, but I think to change >> to that the frozen page guarantees that page is all frozen *and* all >> visible. > > It shouldn't. That'd potentially cause corruption after a wraparound. A > tuple's visibility might change due to that.
The page as frozen could have some dead tuples, right? I think we should to clear a bit of FrozenMap (and flag of page header) on delete operation, and a bit is set only by vacuum. So accordingly, the page as frozen guarantees that all frozen and all visible? Regards, ------- Sawada Masahiko -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
