From: ow <oneway_111@yahoo.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-sql@postgresql.org
Subject: Re: 7.4 - FK constraint performance
Date: Thu, 12 Feb 2004 16:25:48 -0800 (PST)
Message-ID: <20040213002548.19523.qmail@web60808.mail.yahoo.com> (raw)
In-Reply-To: <24947.1076630425@sss.pgh.pa.us>
--- Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Well, there's the smoking gun all right. Why does it think there are
> going to be 7893843 matching rows!? Could we see the pg_stats row for
> the large.small_id column?
>
> regards, tom lane
schemaname tablename attname null_frac avg_width n_distinct most_common_vals
most_common_freqs histogram_bounds correlation
my large small_id 0 4 10 {7,3,5,1,4,2,8,10,6,9}
{0.108667,0.105,0.104333,0.101333,0.100667,0.0983333,0.0983333,0.0983333,0.094,0.091}
0.0597573
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To: pgsql-sql@postgresql.org
Cc: oneway_111@yahoo.com, tgl@sss.pgh.pa.us
Subject: Re: 7.4 - FK constraint performance
In-Reply-To: <20040213002548.19523.qmail@web60808.mail.yahoo.com>
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