echo 'select 1' > select.sql while /bin/true; do pgbench -n -f select.sql -R 1000 -j 8 -c 8 -T 1 > /dev/null 2>&1; date; done;Indeed. I'll look at it over the weekend.So I guess this is a bug in 12788ae49e1933f463bc59a6efe46c4a01701b76, or one of the other commits touching this part of the code.
I could not reproduce this issue on head, but I confirm on 11.2. -- Fabien.