Re: Query is stuck

On 4/14/2010 9:20 AM, Satish Burnwal (sburnwal) wrote:
> Index Scan using repcopy_index on repcopy a (cost=0.00..87824607.17
> *rows=28* width=142) (actual time=11773.105..689111.440*rows=1* loops=1)
> Index Cond: ((dm_user)::text = 'u3'::text)
> Filter: ((report_status = 0) AND (report_time = (subplan)))
> SubPlan
> -> Aggregate (cost=3531.30..3531.31 rows=1 width=8) (actual
> time=58.447..58.448 rows=1 loops=11788)
> -> Index Scan using repcopy_index on repcopy b
> (cost=0.00..3526.30*rows=2000* width=8) (actual time=0.017..36.779
> *rows=25842* loops=11788)
> Index Cond: ((($0)::text = (dm_user)::text) AND
> (($1)::text = (dm_ip)::text))
> Filter: ((ss_key)::text<> ''::text)
> Total runtime: 689111.511 ms
> (9 rows)
>

The estimated cost and actual are way off. Have you run Analyze on the
table

you may want to change the statistics collected for this table

http://www.postgresql.org/docs/8.1/static/planner-stats.html

ALTER [ COLUMN ]/column/ SET STATISTICS/integer/

http://www.postgresql.org/docs/8.1/static/sql-altertable.html

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