SELECT * FROM table is too slow
От | Adam PAPAI |
---|---|
Тема | SELECT * FROM table is too slow |
Дата | |
Msg-id | 47656FC5.8060102@wooh.hu обсуждение исходный текст |
Ответы |
Re: SELECT * FROM table is too slow
Re: SELECT * FROM table is too slow |
Список | pgsql-performance |
Hi pgsql-performance, I've a problem with the select * on a small table. See below: x7=# EXPLAIN ANALYZE select * from megjelenesek; QUERY PLAN --------------------------------------------------------------------------------------------------------------------- Seq Scan on megjelenesek (cost=0.00..15633.07 rows=207 width=52) (actual time=103.258..18802.530 rows=162 loops=1) Total runtime: 18815.362 ms (2 rows) x7=# \d megjelenesek; Table "public.megjelenesek" Column | Type | Modifiers -------------+-----------------------------+------------------------------------------------------------ idn | integer | not null default nextval('megjelenesek_idn_seq'::regclass) tag_id | integer | tag_wlap_id | integer | get_date | timestamp without time zone | default now() megjelent | numeric | default 0 Indexes: "megjelenesek_pkey" PRIMARY KEY, btree (idn) "megjelenesek_tag_id" hash (tag_id) "megjelenesek_tag_wlap_id" hash (tag_wlap_id) x7=# SELECT count(idn) from megjelenesek; count ------- 162 (1 row) Why does it take cca 18-20 sec to get the results? Too many indexes? -- Adam PAPAI D i g i t a l Influence http://www.wooh.hu E-mail: wooh@wooh.hu Phone: +36 30 33-55-735 (Hungary)
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