linux-kernel - Re: Raid 0 Swap?

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Message-ID: <44FD7DB3.3060406@aitel.hist.no>
Date:	Tue, 05 Sep 2006 15:37:55 +0200
From:	Helge Hafting <helge.hafting@...el.hist.no>
To:	Bernd Eckenfels <ecki@...a.inka.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Raid 0 Swap?

Bernd Eckenfels wrote:
> In article <200609041529.k84FTolf004383@...ing-police.cc.vt.edu> you wrote:
>   
>> Memory is indeed cheap.  However, if you're already at the max supported
>> memory configuration for your system, buying another RAM socket to plug that
>> cheap memory card into can be *really* expensive.
>>     
>
> Dont expect any useable system performance if you swap regularly.
>   
Not entirely correct.  Performance with continous swapping will
be fine as long as the swap bandwidth is lower than available disk
bandwidth. 

This is a narrow line to walk though, memory bandwidth being
much higher than disk bandwith so it don't take much more
swapping before performance drops like a rock.

Helge Hafting

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