On Thu, May 21, 2020 at 11:51 AM Ranier Vilela <ranier.vf@gmail.com> wrote: > Em qua., 20 de mai. de 2020 às 20:48, Thomas Munro <thomas.munro@gmail.com> escreveu: >> On Thu, May 21, 2020 at 11:15 AM Ranier Vilela <ranier.vf@gmail.com> wrote: >> > postgres=# set max_parallel_workers_per_gather = 0; >> > Time: 227238,445 ms (03:47,238) >> > postgres=# set max_parallel_workers_per_gather = 1; >> > Time: 138027,351 ms (02:18,027) >> >> Ok, so it looks like NT/NTFS isn't suffering from this problem. >> Thanks for testing! > > Maybe it wasn’t clear, the tests were done with your patch applied.
Oh! And how do the times look without it?
Vanila Postgres (latest)
create table t as select generate_series(1, 800000000)::int i;