On Fri, Jul 3, 2015 at 1:23 AM, Simon Riggs <si...@2ndquadrant.com> wrote: > On 2 July 2015 at 16:30, Sawada Masahiko <sawada.m...@gmail.com> wrote: > >> >> Also, the flags of each heap page header might be set PD_ALL_FROZEN, >> as well as all-visible > > > Is it possible to have VM bits set to frozen but not visible? > > The description makes those two states sound independent of each other. > > Are they? Or not? Do we test for an impossible state? >
It's impossible to have VM bits set to frozen but not visible. These bit are controlled independently. But eventually, when all-frozen bit is set, all-visible is also set. 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
