Robert Ayrapetyan <robert.ayrapetyan@xxxxxxxxxx> wrote: > If you look at the rest of my mail - you would notice 50 times > difference in performance. > What you would say? That accessing a page from RAM is more than 50 times as fast as a random access of that page from disk. -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance