Postgres Pro
Downloads
Home   >   mailing lists

Re: Parallel Seq Scan vs kernel read ahead - Mailing list pgsql-hackers

From Thomas Munro
Subject Re: Parallel Seq Scan vs kernel read ahead
Date
Msg-id CA+hUKGK=hyqyru1UKJQHiqUC_327ZW_yU-or=aNWueFN9UP3yw@mail.gmail.com
Whole thread Raw
In response to Re: Parallel Seq Scan vs kernel read ahead  (Ranier Vilela <ranier.vf@gmail.com>)
Responses Re: Parallel Seq Scan vs kernel read ahead
List pgsql-hackers
Tree view 
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!

pgsql-hackers by date:

Previous
From: Ranier Vilela
Date:
Subject: Re: Parallel Seq Scan vs kernel read ahead
Next
From: Ranier Vilela
Date:
Subject: Re: Parallel Seq Scan vs kernel read ahead