linux-kernel - Re: Abysmal disk performance, how to debug?

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Message-ID: <8355959a0701201144x290362d8ja6cd5bc1408475da@mail.gmail.com>
Date:	Sun, 21 Jan 2007 01:14:41 +0530
From:	"Sunil Naidu" <akula2.shark@...il.com>
To:	"Willy Tarreau" <w@....eu>
Cc:	"Ismail Dönmez" <ismail@...dus.org.tr>,
	linux-kernel@...r.kernel.org
Subject: Re: Abysmal disk performance, how to debug?

On 1/20/07, Willy Tarreau <w@....eu> wrote:
> > > >
>
> It is not expected to increase write performance, but it should help
> you do something else during that time, or also give more responsiveness
> to Ctrl-C. It is possible that you have fast and slow RAM, or that your
> video card uses shared memory which slows down some parts of memory
> which are not used anymore with those parameters.

I did test some SATA drives, am getting these value for 2.6.20-rc5:-

[sukhoi@...hoon ~]$ time dd if=/dev/zero of=/tmp/1GB bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 21.0962 seconds, 50.9 MB/s

What can you suggest here w.r.t my RAM & disk?

> Willy

Thanks,

~Akula2
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