From: Josh Berkus <josh@agliodbs.com>
To: pgsql-performance@postgresql.org
Subject: Re: Linux machine aggressively clearing cache
Date: Fri, 30 Mar 2012 17:51:33 -0700
Message-ID: <4F765515.3050203@agliodbs.com> (raw)
In-Reply-To: <807948699.229132.1332959858793.JavaMail.root@mail-1.01.com>
References: <807948699.229132.1332959858793.JavaMail.root@mail-1.01.com>
>> Read cache of course does not need to be flushed and can simply be
>> dumped when the memory is needed, and so Linux will keep more or
>> less unlimited amounts of read cache until it needs the memory for
>> something else ....
>
> Right, that's the normal behavior. Except not on this machine.
So this turned out to be a Linux kernel issue. Will document it on
www.databasesoup.com.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
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To: pgsql-performance@postgresql.org
Cc: josh@agliodbs.com
Subject: Re: Linux machine aggressively clearing cache
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