On Fri, Mar 29, 2019 at 11:16:11AM +0100, Bernd Helmle wrote: > So between ~7% to 18% impact with checksums in this specific case here.
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. -- Michael
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