Hello,
On Sun, Oct 13, 2024 at 08:16:04AM +1300, Thomas Munro wrote:
> > template1=> SELECT COUNT(*) FROM pg_class a, pg_class b, pg_class c;
> >
> > I see only one 100% CPU PostgreSQL process.
>
> If you set set min_parallel_table_scan_size = 0 then it uses
Without it, it uses one CPU and takes about 8.5 s (count is 57512456).
With it, it is indeed parallel (multiple CPU used) and it takes about 6s.
As this is on a machine with slow disks, it is perfectly ok, I just
wanted to see the CPU parallelism in action.
Thank you!
