"Guillaume Smet" <guillaume.smet@gmail.com> writes:
> I'm not saying my benchmark is perfectly relevant: I made it
> excessively simple on purpose. I just see a general slow down which is
> quite consistent accross all the tests I did (with pgbench or the
> application) and I'd really like to know if it's just my case on this
> particular box or something more general.
Are you examining only "trivial" queries? I've been able to identify a
couple of new planner hotspots that could explain some slowdown if the
planning time is material compared to the execution time. If you're
seeing a slowdown on queries that run for awhile, that would be
something else ...
regards, tom lane