From: "Grigory Batalov" <bga@altlinux.org>
To: devel@lists.altlinux.org
Subject: Re: [devel] Mysqld CPU usage at www.sisyphus.ru
Date: Tue, 1 Sep 2009 18:49:53 +0400
Message-ID: <20090901184953.710824a4@bga> (raw)
In-Reply-To: <20090901174018.7f06c9f2@satellite.immomsk.ru>
On Tue, 1 Sep 2009 17:40:18 +0400
Alex Gorbachenko wrote:
> >> innodb ? если да, то OPTIMIZE TABLE как давно делался ?
> >
> >Сделал сейчас, но что-то разницы не заметно.
>
> тогда запрос и explain от него - в студию.
Вот такие запросы тормозят:
SELECT DISTINCT s.name, s.version, s.rel, m.packager, s.summary, s.repo
FROM srpm as s, maintainers as m, rpm as r WHERE r.srpm = s.name AND
m.mail=s.packager AND ( s.name RLIKE 'unichrome' OR s.summary RLIKE
'unichrome' OR s.description RLIKE 'unichrome' OR r.namen RLIKE
'unichrome' ) AND s.repo='Sisyphus' AND r.repo='Sisyphus' ORDER BY 1
ASC LIMIT 0,20;
Может быть, заменить RLIKE на MATCH AGAINST ? Будет быстрее?
Таблицы невелики:
mysql> select count(*) from srpm;
+----------+
| count(*) |
+----------+
| 38240 |
+----------+
1 row in set (0.00 sec)
mysql> select count(*) from rpm;
+----------+
| count(*) |
+----------+
| 109232 |
+----------+
1 row in set (0.00 sec)
mysql> select count(*) from maintainers;
+----------+
| count(*) |
+----------+
| 250 |
+----------+
1 row in set (0.01 sec)
next prev parent reply other threads:[~2009-09-01 14:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-01 13:08 Grigory Batalov
2009-09-01 13:10 ` Alexey I. Froloff
2009-09-01 13:11 ` Alex Gorbachenko
2009-09-01 13:32 ` Grigory Batalov
2009-09-01 13:40 ` Alex Gorbachenko
2009-09-01 14:49 ` Grigory Batalov [this message]
2009-09-01 15:03 ` Mikhail Yakshin
2009-09-01 19:20 ` Grigory Batalov
2009-09-01 19:21 ` Aleksey Avdeev
2009-09-01 20:27 ` Grigory Batalov
2009-09-01 21:47 ` Mikhail Yakshin
2009-09-02 1:16 ` Денис Смирнов
2009-09-02 4:35 ` Mikhail Yakshin
2009-09-01 13:12 ` Michael Shigorin
2009-09-01 16:36 ` Vitaly Lipatov
2009-09-01 20:49 ` Денис Смирнов
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