From: | Greg Smith <gsmith(at)gregsmith(dot)com> |
---|---|
To: | Sam Mason <sam(at)samason(dot)me(dot)uk> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: clearing the buffer cache |
Date: | 2009-02-16 22:19:42 |
Message-ID: | Pine.GSO.4.64.0902161715500.4374@westnet.com |
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Lists: | pgsql-general |
On Mon, 16 Feb 2009, Sam Mason wrote:
> On Mon, Feb 16, 2009 at 11:09:59AM -0500, Chris Mayfield wrote:
>> You can also try something like this:
>> http://wiki.services.openoffice.org/wiki/Cold-start-simulator
>> might take too long in your situation of thousands of small queries.
>
> Why is this better than asking the kernel to drop its caches?
fillmem/flushdisk also work with kernels before 2.6.16, which means that
it's not avaialble on still common platforms (RHEL4 for example). If
you've got drop_caches, it's the better approach, that pages gives an
answer if you don't too.
--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD
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