On Wed, Jul 22, 2020 at 3:57 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
> Yeah, that is true but every time before the test the same amount of
> data should be present in shared buffers (or OS cache) if any which
> will help in getting consistent results. However, it is fine to
> reboot the machine as well if that is a convenient way.
We really should have an extension (pg_prewarm?) that knows how to
kick stuff out PostgreSQL's shared buffers and the page cache
(POSIX_FADV_DONTNEED).