Re: Nested Loop - Mailing list pgsql-performance

From Gauri Kanekar
Subject Re: Nested Loop
Date
Msg-id 7e4ba9550703270343o4dadf1c0sdcf9f06eba64ed00@mail.gmail.com
Whole thread Raw
In response to Re: Nested Loop  (Ragnar <gnari@hive.is>)
Responses Re: Nested Loop
List pgsql-performance
Hi,
 
here is the query
 
SELECT rs.id AS sid, rs.name AS sname, rc.id AS campid, rc.name AS campname, rc.rev_type AS revtype, rc.act_type AS actntype, ra.id AS advid, ra.name AS advname, rpt_chn.id AS chanid, rpt_chn.name AS channame, rpt_cre.dn AS dn, SUM(rm.imdel) AS impression, SUM(rm.cdel) AS click, rd.sqldate AS date FROM rm, rn CROSS JOIN rd, ra, rs, rc, rpt_chn, rpt_cre WHERE rm.date_key = rd.key AND rm.net_key = rn.key AND rm.adv_key = ra.key AND rm.camp_key = rc.key AND rm.s_key = rs.key AND rm.chn_key = rpt_chn.key AND rm.cre_key = rpt_cre.key AND ra.name != 'SYSTEM' AND rd.sqldate BETWEEN '12/1/2006' AND '12/30/2006' AND ( rn.id IN ( 607 ) ) GROUP BY rd.sqldate , rs.id, rs.name, ra.id, ra.name, rc.id, rc.name, rc.rev_type , rc.act_type, rpt_chn.id, rpt_chn.name, rpt_cre.dn;

 
 
On 3/26/07, Ragnar <gnari@hive.is> wrote:
On mán, 2007-03-26 at 20:33 +0530, Gauri Kanekar wrote:

you did not show your query, nor did you answer whather you had vacuumed
and analyzed.

> enable_seqscan = off

why this? this is unlikely to help


>
> QUERY PLAN
> ...
>                                  ->  Nested Loop
> (cost=0.00..1104714.83 rows=6801 width=44) (actual
> time=1820.153..229779.814 rows=10945938 loops=1)

the estimates are way off here. you sure you have analyzed?

gnari

>




--
Regards
Gauri

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