From: Sitsofe Wheeler <sitsofe@yahoo.com>
To: Alexey Fisher <bug-track@fisher-privat.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: smart cache. ist is possible?
Date: Sun, 15 Mar 2009 18:13:15 +0000 [thread overview]
Message-ID: <20090315181315.GA4369@silver.sucs.org> (raw)
In-Reply-To: <49BD1EB7.6080109@fisher-privat.net>
Hi,
On Sun, Mar 15, 2009 at 04:28:55PM +0100, Alexey Fisher wrote:
> I found for my self how great is cache in linux. If read one file from
> disk, so i don't need to do it second time, chace will do the job. It
> speed up thing greatly. But i found it not working with realy big files.
> Like i have 4GB RAM, so if i read a file like 4.6GB, cache won't work.
Watch out - if you are doing cache tests you really want to be using
drop_caches ( http://linux-mm.org/Drop_Caches ) before your "cold" runs
so you can be sure that the cache really was empty before you started...
--
Sitsofe | http://sucs.org/~sits/
next prev parent reply other threads:[~2009-03-15 18:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-15 15:28 smart cache. ist is possible? Alexey Fisher
2009-03-15 18:13 ` Sitsofe Wheeler [this message]
2009-03-15 22:06 ` Alexey Fisher
2009-03-15 23:26 ` Sitsofe Wheeler
2009-03-16 7:34 ` Alexey Fisher
2009-03-16 17:36 ` Sitsofe Wheeler
2009-03-15 22:23 ` Dave Chinner
2009-03-16 13:02 ` Pádraig Brady
2009-03-16 15:15 ` Paulo Marques
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