On Wed, Jul 22, 2020 at 3:57 PM Amit Kapila <amit.kapil...@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).
