On Tue, Nov 26, 2024 at 8:38 PM Masahiko Sawada <sawada.m...@gmail.com> wrote: > > visibility map: 5 pages set all-visible, 4 pages set all-frozen. > > Which means that 5 pages were marked as only all-visible and 4 pages > were marked as all-frozen (and possibly all-visible too). The total > number of pages' whose VM status changed is the sum of these two > numbers, 9 pages. We would have no idea how many total VM bits were > set, though.
To me, the above output means 9 bits changed, 5 of which were all-visible bits and 4 of which were all-frozen bits. It doesn't say whether they were the same pages or not (although we might be able to infer that based on only 3 of the 4 states being valid). If you want to count the number of pages that changed state, then I think the message wording needs to be different, but personally I think counting the number of flipped bits of each type seems easier to understand. -- Robert Haas EDB: http://www.enterprisedb.com
