| From: | Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com> |
|---|---|
| To: | Donny Drummonds <donny(at)cypresstg(dot)com> |
| Cc: | <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: Indexes on Large Tables |
| Date: | 2003-02-06 19:33:37 |
| Message-ID: | 20030206113257.H40575-100000@megazone23.bigpanda.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin |
On Mon, 3 Feb 2003, Donny Drummonds wrote:
> I am running a dual athlon 1800 with an gig of ram. I am running postgres
> 7.2. I have a table that hs 15 million rows. I have a query that has one
> columns and the select cluase and one column in the where clause with no
> joining or sub-queries. If I do not index the column from the where clause
> the query returns the 150,000 rows in 4 and a half minutes. If in do index
> the column from the where clause using a btree the 150,000 rows return in 11
> and a half minutes.
>
> Any insight would be greatly appreciated.
Hmm, have you analyzed recently? In any case, the table definition, query
and explain analyze outpute would be useful to see.
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