>>>>> "PG" == PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
PG> Is there an extra setting for Postgres 10+ required to "recover" PG> the performance loss from PG9.5?
The default wal_level changed between pg 9.6 and pg10, does revertingthat change make any difference? (this is just a guess)
PG> Why is PG10+ slower by default when synchronous_commit is off?
synchronous_commit is probably only relevant to the extent that turningit off causes the test not to be bottlenecked on WAL flush calls.
-- Andrew (irc:RhodiumToad)