RE: OT: high WIO on Linux

From: Nuno Souto <dbvision_at_iinet.net.au>
Date: Thu, 16 Mar 2006 07:55:50 +0800
Message-ID: <1142466950.4418a98610fa8@mail.iinet.net.au>

Quoting Kevin Closson <kevinc_at_polyserve.com>:

> >>>The SAN we have does not have average IO size. I know for
> >>>sure 2.6 is way better on large IOs, I just dont know wether
> >>>I can fully thrust iostat. What's your observeation with RH4
> >>>and the 2.6 kernel ?
>
> It passed through 512KB. That is what I've seen ... and that is
> "good"
>
> You can trust iostat -x if you don't "snack" on the data...do something
> like iostat -x 30
>
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>

Have you folks had any chance of trying out the different IO schedulers in 2.6? The anticipatory one seems to be the ticket for FTS-oriented systems. RH has an article on some benchmarks they did that seems to indicate the cfq is best overall for Oracle:
http://www.redhat.com/magazine/008jun05/features/schedulers/ Thoughts?

-- 
Cheers
Nuno Souto
from sunny Sydney
--
http://www.freelists.org/webpage/oracle-l

Received on Wed Mar 15 2006 - 17:55:50 CST