अनुकूलन चयन क्वेरी और मैच के खिलाफ

Question

निम्न क्वेरी 25 सेकंड 2 टेबल के साथ जुड़ जाता है लेता है। पहली पोस्ट टेबल में 150,00 पंक्तियां हैं, विषयों की तालिका में 50,000 पंक्तियां हैं। कोई भी जानता है कि मैं इसे कैसे गति दे सकता हूं।

SELECT SQL_NO_CACHE 
    post_search.post_id, 
    topic_search.topic_id, 
    topic_search.topic_title, 
    topic_search.topic_last_post_time, 
    MATCH(post_search.post_text,topic_search.topic_title) AGAINST('search_terms' IN BOOLEAN MODE) AS score 
FROM bb_posts_fulltext_search post_search 
LEFT JOIN bb_topics_fulltext_search topic_search 
    ON post_search.topic_id = topic_search.topic_id 
WHERE MATCH(post_search.post_text,topic_search.topic_title) AGAINST('search_terms' IN BOOLEAN MODE) 
GROUP BY topic_search.topic_id 
ORDER BY score DESC 
LIMIT 0,6 

mysql> DESCRIBE bb_posts_fulltext_search; 
+-----------+------------+------+-----+---------+-------+ 
| Field  | Type  | Null | Key | Default | Extra | 
+-----------+------------+------+-----+---------+-------+ 
| post_id | bigint(20) | NO | PRI | NULL |  | 
| post_text | longtext | YES | MUL | NULL |  | 
| topic_id | bigint(20) | YES | MUL | NULL |  | 
+-----------+------------+------+-----+---------+-------+ 

वर्णन वर्णन

mysql> DESCRIBE bb_topics_fulltext_search 
    -> ; 
+----------------------+--------------+------+-----+---------+-------+ 
| Field    | Type   | Null | Key | Default | Extra | 
+----------------------+--------------+------+-----+---------+-------+ 
| topic_id    | int(11)  | NO | PRI | NULL |  | 
| topic_title   | varchar(255) | YES | MUL | NULL |  | 
| topic_posts   | bigint(20) | YES |  | NULL |  | 
| topic_poster_name | varchar(40) | YES |  | NULL |  | 
| topic_last_post_id | bigint(20) | YES |  | NULL |  | 
| forum_id    | int(11)  | YES |  | NULL |  | 
| parent_group_id  | int(11)  | YES |  | NULL |  | 
| child_group_id  | int(11)  | YES |  | NULL |  | 
| topic_last_post_time | datetime  | YES | MUL | NULL |  | 
+----------------------+--------------+------+-----+---------+-------+ 

व्याख्या

+----+-------------+--------------+--------+---------------+---------+---------+----------------------------------+--------+---------------------------------+ 
| id | select_type | table  | type | possible_keys | key  | key_len | ref        | rows | Extra       | 
+----+-------------+--------------+--------+---------------+---------+---------+----------------------------------+--------+---------------------------------+ 
| 1 | SIMPLE  | post_search | ALL | NULL   | NULL | NULL | NULL        | 158972 | Using temporary; Using filesort | 
| 1 | SIMPLE  | topic_search | eq_ref | PRIMARY  | PRIMARY | 4  | wordpress.post_search.topic_id |  1 | Using where      | 
+----+-------------+--------------+--------+---------------+---------+---------+----------------------------------+--------+---------------------------------+ 

अद्यतन: इंडेक्स

+--------------------------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ 
| Table     | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | 
+--------------------------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ 
| bb_posts_fulltext_search |   0 | PRIMARY |   1 | post_id  | A   |  158972 |  NULL | NULL |  | BTREE  |   |    | 
| bb_posts_fulltext_search |   1 | topic_id |   1 | topic_id | A   |  52990 |  NULL | NULL | YES | BTREE  |   |    | 
| bb_posts_fulltext_search |   1 | post_text |   1 | post_text | NULL  |   1 |  NULL | NULL | YES | FULLTEXT |   |    | 
+--------------------------+------------+-----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ 

बनाएँ 1

DROP TABLE IF EXISTS `wordpress`.`bb_posts_fulltext_search`; 
CREATE TABLE `wordpress`.`bb_posts_fulltext_search` (
    `post_id` bigint(20) NOT NULL, 
    `post_text` longtext, 
    `topic_id` bigint(20) DEFAULT NULL, 
    PRIMARY KEY (`post_id`), 
    KEY `topic_id` (`topic_id`), 
    FULLTEXT KEY `post_text` (`post_text`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

बनाएँ 2

DROP TABLE IF EXISTS `wordpress`.`bb_topics_fulltext_search`; 
CREATE TABLE `wordpress`.`bb_topics_fulltext_search` (
    `topic_id` int(11) NOT NULL, 
    `topic_title` varchar(255) DEFAULT NULL, 
    `topic_posts` bigint(20) DEFAULT NULL, 
    `topic_poster_name` varchar(40) DEFAULT NULL, 
    `topic_last_post_id` bigint(20) DEFAULT NULL, 
    `forum_id` int(11) DEFAULT NULL, 
    `parent_group_id` int(11) DEFAULT NULL, 
    `child_group_id` int(11) DEFAULT NULL, 
    `topic_last_post_time` datetime DEFAULT NULL, 
    PRIMARY KEY (`topic_id`), 
    KEY `topic_last_post_time` (`topic_last_post_time`), 
    FULLTEXT KEY `topic_title` (`topic_title`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

समाधान: http://forums.mysql.com/read.php?115,418955,418955#msg-418955

Answer 1

ओपी यहाँ एक जवाब मिल गया है, अगर लिंक गायब हो जाता है, नीचे में पाठ है उस लिंक:

DROP TABLE IF EXISTS `wordpress`.`bb_posts_fulltext_search`; 
CREATE TABLE `wordpress`.`bb_posts_fulltext_search` (
`post_id` int(10) unsigned NOT NULL, 
`post_text` longtext, 
`topic_id` int(10) unsigned NOT NULL DEFAULT '0', 
PRIMARY KEY (`post_id`,`topic_id`) USING BTREE, 
FULLTEXT KEY `post_text` (`post_text`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

DROP TABLE IF EXISTS `wordpress`.`bb_topics_fulltext_search`; 
CREATE TABLE `wordpress`.`bb_topics_fulltext_search` (
`topic_id` int(11) NOT NULL, 
`topic_title` varchar(255) DEFAULT NULL, 
`topic_posts` bigint(20) DEFAULT NULL, 
`topic_poster_name` varchar(40) DEFAULT NULL, 
`topic_last_post_id` bigint(20) DEFAULT NULL, 
`forum_id` int(11) DEFAULT NULL, 
`parent_group_id` int(11) DEFAULT NULL, 
`child_group_id` int(11) DEFAULT NULL, 
`topic_last_post_time` datetime DEFAULT NULL, 
PRIMARY KEY (`topic_id`), 
KEY `topic_last_post_time` (`topic_last_post_time`), 
FULLTEXT KEY `topic_title` (`topic_title`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

SELECT 
    topic_search.topic_id, 
    topic_search.topic_title, 
    topic_search.topic_posts, 
    topic_search.topic_title, 
    topic_search.topic_poster_name, 
    topic_search.topic_last_post_id, 
    topic_search.topic_last_post_time, 
    MATCH(post_search.post_text,topic_search.topic_title) 
    AGAINST('searchterms' IN BOOLEAN MODE) AS score 
FROM bb_posts_fulltext_search as post_search 
LEFT JOIN bb_topics_fulltext_search as topic_search 
    ON post_search.topic_id = topic_search.topic_id 
WHERE 
    MATCH(post_search.post_text,topic_search.topic_title) 
    AGAINST('searchterms' IN BOOLEAN MODE) 
GROUP BY topic_search.topic_id 
ORDER BY score DESC 
LIMIT 0,6