From: Adrian Moisey <adrian@careerjunction.co.za>
To: Richard Huxton <dev@archonet.com>
Cc: Bill Moran <wmoran@collaborativefusion.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: db size
Date: Thu, 17 Apr 2008 10:43:47 +0200
Message-ID: <48070DC3.1040709@careerjunction.co.za> (raw)
In-Reply-To: <48070708.4060605@archonet.com>
References: <4802F9E4.3000704@careerjunction.co.za>
<op.t9lf4tvrcigqcu@apollo13.peufeu.com>
<48032237.4040604@careerjunction.co.za>
<op.t9lgusticigqcu@apollo13.peufeu.com>
<4803276C.2090901@careerjunction.co.za>
<op.t9lh5em8cigqcu@apollo13.peufeu.com>
<48045A32.3010607@careerjunction.co.za>
<20080415071222.36b2e8eb.wmoran@collaborativefusion.com>
<4806EE1A.8010400@careerjunction.co.za>
<48070708.4060605@archonet.com>
Hi
>> INFO: "blahxxx": scanned 27 of 27 pages, containing 1272 live rows
>> and 0 dead rows; 1272 rows in sample, 1272 estimated total rows
>
> This is a small table that takes up 27 pages and it scanned all of them.
> You have 1272 rows in it and none of them are dead (i.e. deleted/updated
> but still taking up space).
I had a look through a few other tables...:
INFO: "table1": scanned 22988 of 22988 pages, containing 2713446 live
rows and 895662 dead rows; 45000 rows in sample, 2713446 estimate
d total rows
INFO: "table2": scanned 24600 of 24600 pages, containing 270585 live
rows and 65524 dead rows; 45000 rows in sample, 270585 estimated total rows
Is that dead rows an issue? Should I try clean it out? Will it improve
performance ?
--
Adrian Moisey
Systems Administrator | CareerJunction | Your Future Starts Here.
Web: www.careerjunction.co.za | Email: adrian@careerjunction.co.za
Phone: +27 21 686 6820 | Mobile: +27 82 858 7830 | Fax: +27 21 686 6842
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To: pgsql-performance@postgresql.org
Cc: adrian@careerjunction.co.za, dev@archonet.com, wmoran@collaborativefusion.com
Subject: Re: db size
In-Reply-To: <48070DC3.1040709@careerjunction.co.za>
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