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From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: Marcelo Tosatti <marcelo.tosatti@cyclades.com>,
	Martin Knoblauch <knobi@knobisoft.de>,
	linux-kernel@vger.kernel.org
Subject: Re: RAID-0 read perf. decrease after 2.4.20
Date: Thu, 18 Dec 2003 17:17:31 -0200 (BRST)	[thread overview]
Message-ID: <Pine.LNX.4.58L.0312181714090.23845@logos.cnet> (raw)
In-Reply-To: <20031218191318.GC6438@matchmail.com>



On Thu, 18 Dec 2003, Mike Fedyk wrote:

> On Thu, Dec 18, 2003 at 11:41:11AM -0200, Marcelo Tosatti wrote:
> > On Tue, 16 Dec 2003, Martin Knoblauch wrote:
> > >  Just some feedback:
> > >
> > > echo 511 > /proc/sys/vm/max-readahead
> > >
> > >  brings back the read performance of my 30 disks on 4 controller
> > > LVM/RAID0.
> >
> > Great.
>
> Maybe a new default is in order?

I believe the defaults have been changed because they harm smaller
workloads.


  reply	other threads:[~2003-12-18 19:38 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-16 12:51 RAID-0 read perf. decrease after 2.4.20 Martin Knoblauch
2003-12-18 13:41 ` Marcelo Tosatti
2003-12-18 14:37   ` Martin Knoblauch
2004-07-04 23:28     ` Mikael Johansson
2003-12-18 19:13   ` Mike Fedyk
2003-12-18 19:17     ` Marcelo Tosatti [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-11-25  9:41 Martin Knoblauch
2003-11-24 10:05 Martin Knoblauch
2003-11-25  5:01 ` Joshua Schmidlkofer
2003-11-20 16:45 Mikael Johansson
2003-11-21 13:47 ` Marcelo Tosatti
2003-11-21 19:56   ` Mikael Johansson
2003-12-08 12:47     ` Marcelo Tosatti
2003-12-08 13:11       ` Marc-Christian Petersen
2003-12-08 13:21         ` Marcelo Tosatti

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