| From: | Adrian Moisey <adrian(at)careerjunction(dot)co(dot)za> |
|---|---|
| To: | Richard Huxton <dev(at)archonet(dot)com> |
| Cc: | Bill Moran <wmoran(at)collaborativefusion(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: db size |
| Date: | 2008-04-17 08:43:47 |
| Message-ID: | 48070DC3.1040709@careerjunction.co.za |
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| Thread: | |
| Lists: | pgsql-performance |
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(at)careerjunction(dot)co(dot)za
Phone: +27 21 686 6820 | Mobile: +27 82 858 7830 | Fax: +27 21 686 6842
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