From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Massimo Cetra <mcetra@navynet.it>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Production comparison between 2.4.27 and 2.6.8.1
Date: Wed, 25 Aug 2004 12:28:10 +1000 [thread overview]
Message-ID: <412BF93A.6000902@yahoo.com.au> (raw)
In-Reply-To: <002401c489e4$d7903ec0$0600640a@guendalin>
Massimo Cetra wrote:
> Nick Piggin wrote:
>
>
>>>Is this issue being analyzed ?
>>>Should we hope in an improvement sometime?
>>>Or I'll have to use 2.4 to have good performance ?
>>>
>>
>>You booted with elevator=deadline and things still didn't
>>improve though, correct? If so, then the problem should be
>>found and fixed.
>
>
> Yes, that's correct.
> Thanks. I'll try next versions of kernel.
> I dont think 2.8.9-RC1 includes something regarding this issue.
>
OK, can you try testing different values of
/sys/block/???/queue/read_ahead_kb
and
/sys/block/???/queue/nr_requests
You should set '???' for all disks involved.
First, try setting read_ahead_kb to 0, then 256.
If those values don't change anything, set nr_requests to 1024.
next prev parent reply other threads:[~2004-08-25 2:28 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-21 17:25 Production comparison between 2.4.27 and 2.6.8.1 Massimo Cetra
2004-08-22 1:33 ` Nick Piggin
2004-08-22 15:43 ` Massimo Cetra
2004-08-22 16:54 ` Massimo Cetra
2004-08-23 11:46 ` Massimo Cetra
2004-08-24 2:05 ` Nick Piggin
2004-08-24 14:15 ` Massimo Cetra
2004-08-25 2:28 ` Nick Piggin [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-08-25 7:23 rwhron
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