On Wed, Jan 6, 2021 at 5:39 PM Masahiko Sawada <sawada.mshk@gmail.com> wrote:
> Perhaps you meant to decrease vacuumm_cost_page_miss instead of
> vacuum_cost_page_dirty?
You're right. Evidently I didn't write this email very carefully.
Sorry about that.
To say it again: I think that a miss (without dirtying the page)
should be cheaper than dirtying a page. This thread began because I
wanted to discuss the relative cost of different kinds of I/O
operations to VACUUM, without necessarily discussing the absolute
costs/time delays.
--
Peter Geoghegan
