On Fri, 10 May 2024 at 23:31, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Bruce Momjian <bruce@momjian.us> writes:
> > I looked at both of these. In both cases I didn't see why the user
> > would need to know these changes were made:
>
> I agree that the buffering change is not likely interesting, but
> the fact that you can now control-C out of a psql "\c" command
> is user-visible. People might have internalized the fact that
> it didn't work, or created complicated workarounds.
The buffering change improved performance up to ~40% in some of the
benchmarks. The case it improves mostly is COPY of large rows and
streaming a base backup. That sounds user-visible enough to me to
warrant an entry imho.