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To: Bill Moran <wmoran@collaborativefusion.com>
cc: pgsql-performance@postgresql.org
Subject: Re: How to determine if my setting for shared_buffers is too high? 
In-reply-to: <20061207114239.c6b72e63.wmoran@collaborativefusion.com> 
References: <20061207114239.c6b72e63.wmoran@collaborativefusion.com>
Comments: In-reply-to Bill Moran <wmoran@collaborativefusion.com>
	message dated "Thu, 07 Dec 2006 11:42:39 -0500"
Date: Thu, 07 Dec 2006 12:04:40 -0500
Message-ID: <16436.1165511080@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
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Bill Moran <wmoran@collaborativefusion.com> writes:
> I haven't been able to find anything regarding how much of the
> shared buffer space PostgreSQL is actually using, as opposed to
> simply allocating.

In 8.1 and up, contrib/pg_buffercache/ would give you some visibility
of this.

			regards, tom lane