Re: [GENERAL] Question slow query
От | Andreas Joseph Krogh |
---|---|
Тема | Re: [GENERAL] Question slow query |
Дата | |
Msg-id | VisenaEmail.3d.dcd47ba5e256a39c.15990c87654@tc7-visena обсуждение исходный текст |
Ответ на | [GENERAL] Question slow query (Patrick B <patrickbakerbr@gmail.com>) |
Ответы |
Re: [GENERAL] Question slow query
|
Список | pgsql-general |
På torsdag 12. januar 2017 kl. 03:15:59, skrev Patrick B <patrickbakerbr@gmail.com>:
Hi guys,I've got a slow query, running at 25 seconds.-> Bitmap Heap Scan on ja_notes r_1103088 (cost=234300.55..1254978.62 rows=553275 width=101) (actual time=1423.411..10572.549 rows=475646 loops=1) Recheck Cond: (n_type = ANY ('{note,note_1,note_2}'::n_type[])) Filter: (timezone('Etc/UTC'::text, d_modified) >= '2016-08-07 23:12:34'::timestamp without time zone) Rows Removed by Filter: 13725231As you can see, 13.725.231 rows were removed by Filter..Should I create an index for this column?d_modified | timestamp with time zone | default statement_timestamp()I tried but it didn't help... the query doesn't even hit the index.
CREATE INDEX q ON test USING BTREE (d_modified);
Am I missing something?
Yes, you've not shown us:
1. The query
2. The schema
3. Complete EXPLAIN-output
--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
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