Re: Delete query takes exorbitant amount of time
От | Karim Nassar |
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Тема | Re: Delete query takes exorbitant amount of time |
Дата | |
Msg-id | 1111865788.9172.13.camel@k2.cet.nau.edu обсуждение исходный текст |
Ответ на | Re: Delete query takes exorbitant amount of time (Stephan Szabo <sszabo@megazone.bigpanda.com>) |
Ответы |
Re: Delete query takes exorbitant amount of time
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Список | pgsql-performance |
On Sat, 2005-03-26 at 07:55 -0800, Stephan Szabo wrote: > That seems like it should be okay, hmm, what does something like: > > PREPARE test(int) AS SELECT 1 from measurement where > id_int_sensor_meas_type = $1 FOR UPDATE; > EXPLAIN ANALYZE EXECUTE TEST(1); > > give you as the plan? QUERY PLAN ----------------------------------------------------------------------------------------------------------------------- Seq Scan on measurement (cost=0.00..164559.16 rows=509478 width=6) (actual time=11608.402..11608.402 rows=0 loops=1) Filter: (id_int_sensor_meas_type = $1) Total runtime: 11608.441 ms (3 rows) -- Karim Nassar Department of Computer Science Box 15600, College of Engineering and Natural Sciences Northern Arizona University, Flagstaff, Arizona 86011 Office: (928) 523-5868 -=- Mobile: (928) 699-9221
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