No, read this (first hit for page cache @Google):

http://en.wikipedia.org/wiki/Page_cache




________________________________
> From: crirus@gmail.com
> Date: Mon, 4 Feb 2013 18:28:49 +0200
> Subject: Re: HDD util is 100% - aio questions
> To: nginx@nginx.org
>
> I read alreayd, pagecache is a plugin for Magento?
> ---------------------------------------------------------------
> Cristian Rusu
> Web Developement & Electronic Publishing
>
> ======
> Crilance.com
> Crilance.blogspot.comhttp://Crilance.blogspot.com
>
>
> On Mon, Feb 4, 2013 at 2:34 PM, Jonathan Matthews
> <contact@jpluscplusm.com<mailto:contact@jpluscplusm.com>> wrote:
> On 4 February 2013 07:00, Cristian Rusu
> <crirus@gmail.com<mailto:crirus@gmail.com>> wrote:
> > Pagecache?
>
> Yes, page cache. http://bit.ly/12mJ61j
>
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