Date: Mon, 11 Jun 2007 08:34:23 -0600
From: Michael Fuhr <mike@fuhr.org>
To: Nimesh Satam <nimesh.zedo@gmail.com>
Cc: Heikki Linnakangas <heikki@enterprisedb.com>,
	pgsql-performance@postgresql.org, database@zedo.com
Subject: Re: pg_statistic doesnt contain details for specific table
Message-ID: <20070611143423.GA33335@winnie.fuhr.org>
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	<466D0DB4.2080404@enterprisedb.com>
	<965aa3ed0706110158r27c9c19aj32a87d9ccf7e2383@mail.gmail.com>
	<20070611132953.GA32879@winnie.fuhr.org>
	<965aa3ed0706110652k496af68di8217d488fa6e297a@mail.gmail.com>
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On Mon, Jun 11, 2007 at 07:22:24PM +0530, Nimesh Satam wrote:
> INFO:  analyzing "public.cam_attr"
> INFO:  "cam_attr": scanned 103 of 103 pages, containing 11829 live rows and
> 0 dead rows; 6000 rows in sample, 11829 estimated total rows

Looks reasonable.

> Also how do we check if the statistics are set to Zero for the table?

SELECT attname, attstattarget
  FROM pg_attribute
 WHERE attrelid = 'public.cam_attr'::regclass
   AND attnum > 0
   AND NOT attisdropped;

If nobody has changed the statistics targets then they're all
probably -1.  Negative attstattarget values mean to use the system
default, which you can see with:

SHOW default_statistics_target;

How exactly are you determining that no statistics are showing up
for this table?  Are you running a query like the following?

SELECT *
  FROM pg_stats
 WHERE schemaname = 'public' AND tablename = 'cam_attr';

-- 
Michael Fuhr