2011/6/8 Tony Capobianco <tcapobianco@xxxxxxxxxxxxxx>: > pg_dw=# show random_page_cost ; > Ârandom_page_cost > ------------------ > Â4 > (1 row) > > Time: 0.299 ms > pg_dw=# show seq_page_cost ; > Âseq_page_cost > --------------- > Â1 > (1 row) > > Time: 0.250 ms > pg_dw=# show work_mem ; > Âwork_mem > ---------- > Â768MB > (1 row) > > it is ok. Pavel > > > On Wed, 2011-06-08 at 18:27 +0200, Pavel Stehule wrote: >> Hello >> >> what is your settings for >> >> random_page_cost, seq_page_cost and work_mem? >> >> Regards >> >> Pavel Stehule >> >> 2011/6/8 Tony Capobianco <tcapobianco@xxxxxxxxxxxxxx>: >> > Here's the explain analyze: >> > >> > pg_dw=# explain analyze CREATE TABLE ecr_opens with (FILLFACTOR=100) >> > as >> > select o.emailcampaignid, count(memberid) opencnt >> > Âfrom openactivity o,ecr_sents s >> > Âwhere s.emailcampaignid = o.emailcampaignid >> > Âgroup by o.emailcampaignid; >> > >> > QUERY >> > PLAN >> > ---------------------------------------------------------------------------------------------------------------------------------------------------------------- >> > ÂGroupAggregate Â(cost=0.00..1788988.05 rows=9939 width=12) (actual >> > time=308630.967..2592279.526 rows=472 loops=1) >> > Â -> ÂNested Loop Â(cost=0.00..1742467.24 rows=9279316 width=12) >> > (actual time=31.489..2589363.047 rows=8586466 loops=1) >> > Â Â Â Â -> ÂIndex Scan using ecr_sents_ecid_idx on ecr_sents s >> > (cost=0.00..38.59 rows=479 width=4) (actual time=0.010..13.326 rows=479 >> > loops=1) >> > Â Â Â Â -> ÂIndex Scan using openact_emcamp_idx on openactivity o >> > (cost=0.00..3395.49 rows=19372 width=12) (actual time=1.336..5397.139 >> > rows=17926 loops=479) >> > Â Â Â Â Â Â Â Index Cond: (o.emailcampaignid = s.emailcampaignid) >> > ÂTotal runtime: 2592284.336 ms >> > >> > >> > On Wed, 2011-06-08 at 17:31 +0200, tv@xxxxxxxx wrote: >> >> > On Postgres, this same query takes about 58 minutes (could not run >> >> > explain analyze because it is in progress): >> >> > >> >> > pg_dw=# explain CREATE TABLE ecr_opens with (FILLFACTOR=100) >> >> > pg_dw-# as >> >> > pg_dw-# select o.emailcampaignid, count(memberid) opencnt >> >> > pg_dw-# Â from openactivity o,ecr_sents s >> >> > pg_dw-# Âwhere s.emailcampaignid = o.emailcampaignid >> >> > pg_dw-# Âgroup by o.emailcampaignid; >> >> > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â ÂQUERY >> >> > PLAN >> >> > ------------------------------------------------------------------------------------------------------------- >> >> > ÂGroupAggregate Â(cost=0.00..1788988.05 rows=9939 width=12) >> >> > Â Â-> ÂNested Loop Â(cost=0.00..1742467.24 rows=9279316 width=12) >> >> > Â Â Â Â Â-> ÂIndex Scan using ecr_sents_ecid_idx on ecr_sents s >> >> > (cost=0.00..38.59 rows=479 width=4) >> >> > Â Â Â Â Â-> ÂIndex Scan using openact_emcamp_idx on openactivity o >> >> > (cost=0.00..3395.49 rows=19372 width=12) >> >> > Â Â Â Â Â Â Â ÂIndex Cond: (o.emailcampaignid = s.emailcampaignid) >> >> > (5 rows) >> >> > >> >> >> >> Please, post EXPLAIN ANALYZE, not just EXPLAIN. Preferably using >> >> explain.depesz.com. >> >> >> >> regards >> >> Tomas >> >> >> >> >> > >> > >> > >> > -- >> > Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) >> > To make changes to your subscription: >> > http://www.postgresql.org/mailpref/pgsql-performance >> > >> > > > -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
