Re: 7.4 dramatically slower than 7.3? (was: snowflaking)
От | Stephan Szabo |
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Тема | Re: 7.4 dramatically slower than 7.3? (was: snowflaking) |
Дата | |
Msg-id | 20040406071619.K35247@megazone.bigpanda.com обсуждение исходный текст |
Ответ на | Re: 7.4 dramatically slower than 7.3? (was: snowflaking) (Nabil Sayegh <postgresql@e-trolley.de>) |
Ответы |
Re: 7.4 dramatically slower than 7.3?
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Список | pgsql-novice |
On Tue, 6 Apr 2004, Nabil Sayegh wrote: > When I take the query of my first post and EXPLAIN ANALYZE it with 7.3 I get the following output: > ---------------------------------------------------------------------------------------------------- > Hash Join (cost=85.66..213.16 rows=1 width=240) (actual time=34.01..34.47 rows=1 loops=1) > Now I tested it with 7.4 to see if gets faster, but guess what? > It's about 40 times slower(!): > > ---------------------------------------------------------------------------------------------------- > Merge Left Join (cost=142.22..142.28 rows=2 width=0) (actual time=18.681..18.684 rows=1 loops=1) Hmm, this actual time number seems about 1/2 the above unless I'm missing something (34 vs 19). Is it possible you missed some lines or something while posting?
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