From: Josh Berkus <josh@agliodbs.com>
To: pgsql-performance@postgresql.org
Cc: Chris Hoover <revoohc@gmail.com>
Subject: Re: Tuning Effective Cache Question
Date: Wed, 17 Aug 2005 13:31:38 -0700
Message-ID: <200508171331.38980.josh@agliodbs.com> (raw)
In-Reply-To: <1d219a6f05081710146acb9d40@mail.gmail.com>
References: <1d219a6f05081710146acb9d40@mail.gmail.com>
Chris,
> I have a RHEL 2.1 box running with dual Xeon (2.6 GHz I believe and
> they have HT on). The box has 8GB memory. In my postgresql.conf, I
> have set the effective_cache_size = 530505 (~4GB).
>
> However, I am noticing on this machine, top is telling me that I have
> ~3.5GB in the buff and only 3GB in cached.
effective_cache_size is just information for the query planner; it does not
affect the actually system file cache.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco
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To: pgsql-performance@postgresql.org
Cc: josh@agliodbs.com, revoohc@gmail.com
Subject: Re: Tuning Effective Cache Question
In-Reply-To: <200508171331.38980.josh@agliodbs.com>
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