From: hubert depesz lubaczewski <depesz@gmail.com>
To: Barry Moore <barry.moore@genetics.utah.edu>
Cc: pgsql-performance@postgresql.org
Subject: Re: Performance Tuning and Disk Cache
Date: Sun, 18 Mar 2007 14:18:19 +0100
Message-ID: <9e4684ce0703180618m33fe9ec4v3007a673d28df591@mail.gmail.com> (raw)
In-Reply-To: <1862C4AD-EB83-4D58-B1F2-45BDC47E5608@genetics.utah.edu>
References: <1862C4AD-EB83-4D58-B1F2-45BDC47E5608@genetics.utah.edu>
On 3/18/07, Barry Moore <barry.moore@genetics.utah.edu> wrote:
> Does anyone know how I can repeatedly run the same query in the
> "worst case scenario" of no postgres data in the disk cache (e.g.,
> clear the page cache or force it to be ignored)?
try to disconnect from postgresql, reconnect, rerun the query.
if it doesn't help - you can try unmounting filesystem which contains
postgresql data, and remounting it again. of course with postgresql
shutdown.
depesz
--
http://www.depesz.com/ - nowy, lepszy depesz
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To: pgsql-performance@postgresql.org
Cc: depesz@gmail.com, barry.moore@genetics.utah.edu
Subject: Re: Performance Tuning and Disk Cache
In-Reply-To: <9e4684ce0703180618m33fe9ec4v3007a673d28df591@mail.gmail.com>
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