[GENERAL] Question slow query

Поиск
Список
Период
Сортировка
От Patrick B
Тема [GENERAL] Question slow query
Дата
Msg-id CAJNY3iu7hnxSLTcx-oOwGmvd9wTTKBBRPbOmeEeXyjkKwdthqg@mail.gmail.com
обсуждение исходный текст
Ответы Re: [GENERAL] Question slow query
Список pgsql-general
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: 13725231


As 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? 

Thanks!

В списке pgsql-general по дате отправления:

Предыдущее
От: Karl Czajkowski
Дата:
Сообщение: [GENERAL] Re: Are new connection/security features in order, given connectionpooling?
Следующее
От: Ian Lewis
Дата:
Сообщение: Re: [GENERAL] Means to emulate global temporary table