Re: out of memory

Thanks for your response,

I've made this request :

SELECT query_string, DAY.ocu from search_data.query_string,
 (SELECT SUM(occurence) as ocu, query
FROM daily.queries_detail_statistics
 WHERE date >= '2006-01-01' AND date <= '2006-01-30'
 AND portal IN (1,2)
 GROUP BY query
 ORDER BY ocu DESC
 LIMIT 1000) as DAY
 WHERE DAY.query=id;

and after few minutes, i've error "out of memory" with this execution plan :
Nested Loop  (cost=8415928.63..8418967.13 rows=1001 width=34)
   ->  Subquery Scan "day"  (cost=8415928.63..8415941.13 rows=1000 width=16)
         ->  Limit  (cost=8415928.63..8415931.13 rows=1000 width=12)
               ->  Sort  (cost=8415928.63..8415932.58 rows=1582 width=12)
                     Sort Key: sum(occurence)
                     ->  HashAggregate  (cost=8415840.61..8415844.56 rows=1582
width=12)
                           ->  Seq Scan on queries_detail_statistics
(cost=0.00..8414056.00 rows=356922 width=12)
                                 Filter: ((date >= '2006-01-01'::date) AND (date
<= '2006-01-30'::date) AND (((portal)::text = '1'::text) OR ((portal)::text =
'2'::text)))
   ->  Index Scan using query_string_pkey on query_string  (cost=0.00..3.01
rows=1 width=34)
         Index Cond: ("outer".query = query_string.id)
(10 rows)

if HashAgg operation ran out of memory, what can i do ?

thanks a lot
martial

> martial.bizel@free.fr writes:
> > I've error "out of memory" with these traces :
>
> Doing what?
>
> > AggContext: -1976573952 total in 287 blocks; 25024 free (414 chunks);
> > -1976598976 used
> > DynaHashTable: 503439384 total in 70 blocks; 6804760 free (257 chunks);
> > 496634624 used
>
> I'd guess that a HashAgg operation ran out of memory ...
>
>             regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 1: if posting/reading through Usenet, please send an appropriate
>        subscribe-nomail command to majordomo@postgresql.org so that your
>        message can get through to the mailing list cleanly
>