Am Freitag, den 29.03.2019, 23:10 +0900 schrieb Michael Paquier: > > I can't really believe that many people set up shared_buffers at > 128kB > which would cause such a large number of page evictions, but I can > believe that many users have shared_buffers set to its default value > and that we are going to get complains about "performance drop after > upgrade to v12" if we switch data checksums to on by default.
Yeah, i think Christoph's benchmark is based on this thinking. I assume this very unrealistic scenery should emulate the worst case (many buffer_reads, high checksum calculation load). Bernd