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Date: Wed, 11 Mar 2009 14:40:44 -0500
From: "Kevin Grittner" <Kevin.Grittner@wicourts.gov>
To: "Scott Carey" <scott@richrelevance.com>
Cc: <gryzman@gmail.com>,<Andrej <andrej.groups@gmail.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>,
	"Jeff" <threshar@torgo.978.org>
Subject: Re: random_page_cost vs ssd?
References: <b35603930903111204l6825f931kf67183f7c48971fe@mail.gmail.com>
	<C5DD5F07.32E1%scott@richrelevance.com>
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Scott Carey <scott@richrelevance.com> wrote:
> On 3/11/09 11:04 AM, "Andrej" <andrej.groups@gmail.com> wrote:
>> 2009/3/12 Scott Carey <scott@richrelevance.com>:
 
>>> All tests start with 'cat 3 > /proc/sys/vm/drop_caches'
 
>> What's the content of '3' above?
 
> Google > *linux drop_caches* first result:
> http://www.linuxinsight.com/proc_sys_vm_drop_caches.html
> 
> To be sure a test is going to disk and not file system cache for
> everything in linux, run:
> *sync; cat 3 > /proc/sys/vm/drop_caches*
 
The cited page recommends "echo 3" -- is that what you used in your
tests, or the "cat 3" you repeated specify?  If the latter, what is in
the "3" file?
 
>> Please don't top post, and don't use HTML e-Mail :}  Make your
>> quotes concise.
>> 
>> http://www.american.edu/econ/notes/htmlmail.htm
 
Did you miss this part?
 
-Kevin