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help / color / mirror / Atom feedFrom: David Fetter <[email protected]>
To: Tom Lane <[email protected]>
Cc: PostgreSQL Docs <[email protected]>
Cc: PostgreSQL Patches <[email protected]>
Subject: Re: [PATCHES] Approximate count(*)
Date: Thu, 24 Mar 2005 09:58:27 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
<[email protected]>
On Thu, Mar 24, 2005 at 12:34:51PM -0500, Tom Lane wrote:
> David Fetter <[email protected]> writes:
> > Please find enclosed a patch that shows how to get a quick
> > approximation of count(*) on a table.
>
> I'm not sure we should be encouraging people to look at reltuples...
> for one thing, it's deliberately a moving average under 8.0.
Should there be more caveats?
Cheers,
D
--
David Fetter [email protected] http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778
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