On Fri, Mar 22, 2013 at 4:53 PM, Amit Kapila <amit.kap...@huawei.com> wrote: > On Friday, March 22, 2013 4:36 PM Atri Sharma wrote: >> > >> > What would you do if the only young page has usage count zero during >> second >> > sweep. >> >> Umm....The same approach we take when there is no page with usage >> count zero in a sweep in the current algorithm? > > It would give more priority to young page as compare to more used page. > I don't know if that would be correct thing to do.
This is my idea, give equal priority to new pages when they enter the cache, so that they all have an equal chance to be replaced initially. With time, usage_count shall become the deciding factor in victim selection. Regards, Atri -- Regards, Atri l'apprenant -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
