Re: linux deadline i/o elevator tuning - Mailing list pgsql-performance

On Thu, 9 Apr 2009, Grzegorz Jaśkiewicz wrote:
> acording to kernel folks, anticipatory scheduler is even better for dbs.
> Oh well, it probably means everyone has to test it on their own at the
> end of day.

But the anticipatory scheduler basically makes the huge assumption that
you have one single disc in the system that takes a long time to seek from
one place to another. This assumption fails on both RAID arrays and SSDs,
so I'd be interested to see some numbers to back that one up.

Matthew

--
 import oz.wizards.Magic;
   if (Magic.guessRight())...           -- Computer Science Lecturer