このクエリ/データベースはここにクエリのよく一緒

Question

が動作していない：

SELECT 
    *, 
    COUNT(*) as `numauth` 
FROM `favorites` as `f1` 
INNER JOIN `story` as `s1` ON `f1`.`story_id` = `s1`.`story_id` 
WHERE `f1`.`story_id` != '".addslashes($_REQUEST['storyid'])."' 
    AND `f1`.`story_id` != '".addslashes($_REQUEST['storyid2'])."' 
    AND EXISTS (
       SELECT 1 FROM `favorites` as `f2` 
       WHERE `story_id` = '".addslashes($_REQUEST['storyid'])."' 
       AND `f2`.`auth_id` = `f1`.`auth_id`) 
       AND EXISTS (
          SELECT 1 FROM `favorites` as `f3` 
          WHERE `story_id` = '".addslashes($_REQUEST['storyid2'])."' 
          AND `f3`.`auth_id` = `f1`.`auth_id`) 
          AND NOT EXISTS (
              SELECT 1 FROM `favorites` as `f4` 
              WHERE `story_id` = 
              '".addslashes($_REQUEST['exclude'])."'                         
              `f4`.`auth_id` = `f1`.`auth_id`) 
GROUP BY `f1`.`story_id` 
ORDER BY `numauth` DESC, `story_words` DESC 

そして、ここでは、テーブルの説明だ...

CREATE TABLE IF NOT EXISTS `favorites` (
    `fav_id` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `auth_id` int(10) unsigned NOT NULL, 
    `story_id` int(10) unsigned NOT NULL, 
    PRIMARY KEY (`fav_id`), 
    UNIQUE KEY `auth_id_2` (`auth_id`,`story_id`), 
    KEY `auth_id` (`auth_id`), 
    KEY `story_id` (`story_id`), 
    KEY `fav_id` (`fav_id`,`auth_id`,`story_id`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1577985 ; 

CREATE TABLE IF NOT EXISTS `story` (
    `story_id` int(10) unsigned NOT NULL, 
    `story_title` varchar(255) NOT NULL, 
    `story_desc` text NOT NULL, 
    `story_authid` int(8) unsigned NOT NULL, 
    `story_authname` varchar(255) NOT NULL, 
    `story_fandom` varchar(255) NOT NULL, 
    `story_genre1` tinyint(2) unsigned NOT NULL, 
    `story_genre2` tinyint(2) unsigned NOT NULL, 
    `story_created` int(10) unsigned NOT NULL, 
    `story_updated` int(10) unsigned NOT NULL, 
    `story_reviews` smallint(5) unsigned NOT NULL, 
    `story_chapters` smallint(3) unsigned NOT NULL, 
    `story_rating` tinyint(2) unsigned NOT NULL, 
    `story_words` mediumint(7) unsigned NOT NULL, 
    `story_chars` varchar(255) NOT NULL, 
    UNIQUE KEY `story_id` (`story_id`), 
    KEY `story_authid` (`story_authid`), 
    KEY `story_fandom` (`story_fandom`), 
    KEY `story_authid_2` (`story_authid`,`story_fandom`), 
    KEY `story_id_2` (`story_id`,`story_authid`), 
    KEY `story_id_3` (`story_id`,`story_words`), 
    KEY `story_id_4` (`story_id`,`story_fandom`,`story_words`), 
    KEY `story_id_5` (`story_id`,`story_reviews`,`story_words`), 
    KEY `story_words` (`story_words`), 
    KEY `story_reviews` (`story_reviews`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8; 

今私は最適化の公平なビットを行ってきましたこれにクエリを取得する。専用のサーバーで実行していますが、クエリには依然として5〜7秒かかりますが、これは容認できません。私たちはお気に入りの約800,000件のレコードとストーリーの400,000件のレコードを見ています。この時点で、次に改善すべき点については失われています。

誰かが正しい方向に向けることができても、私は幸せになるでしょう。

はサンプル入力でEXPLAIN：

id select_type  table type possible_keys key  key_len  ref  rows Extra 
1 PRIMARY s1 ALL story_id,story_id_2,story_id_3,story_id_4,story_id... NULL NULL NULL 129429 Using where; Using temporary; Using filesort 
1 PRIMARY f1 ref story_id story_id 4 fanfic_jordanl_ffrecs.s1.story_id 2 Using where 
4 DEPENDENT SUBQUERY f4 eq_ref auth_id_2,auth_id,story_id auth_id_2 8 fanfic_jordanl_ffrecs.f1.auth_id,const 1 Using index 
3 DEPENDENT SUBQUERY f3 eq_ref auth_id_2,auth_id,story_id auth_id_2 8 fanfic_jordanl_ffrecs.f1.auth_id,const 1 Using index 
2 DEPENDENT SUBQUERY f2 eq_ref auth_id_2,auth_id,story_id auth_id_2 8 fanfic_jordanl_ffrecs.f1.auth_id,const 1 Using index 

Answer 1

はこの試してください：あなたはAUTH_IDによってグループ化する*選択したがされていないので

SELECT f1.*, s1.*, COUNT(*) as `numauth` 
FROM `favorites` as `f1` 
INNER JOIN `story` as `s1` ON `f1`.`story_id` = `s1`.`story_id` 
INNER JOIN (
     SELECT auth_id 
     FROM favorites 
     WHERE story_id IN ('".addslashes($_REQUEST['storyid'])."', '".addslashes($_REQUEST['storyid2'])."', '".addslashes($_REQUEST['exclude'])."') 
     GROUP BY auth_id 
     HAVING Count(IF(story_id = '".addslashes($_REQUEST['exclude'])."', 1, NULL)) = 0 AND Count(*) = 2 
     ) fv ON f1.auth_id = fv.auth_id 
WHERE `f1`.`story_id` != '".addslashes($_REQUEST['storyid'])."' 
    AND `f1`.`story_id` != '".addslashes($_REQUEST['storyid2'])."' 
GROUP BY `f1`.`story_id` 
ORDER BY `numauth` DESC, `story_words` DESC 

を、正確に何をやろうとしていますか？

--- UPDATE あなたは話のためのすべてのFAVの情報を必要としないので、このクエリは、より良い実行する必要があります。

SELECT s.*, fv.cnt 
FROM story s 
    JOIN (
     SELECT fv.story_id, COUNT(*) cnt 
     FROM favorites fv 
      JOIN (
       SELECT auth_id 
       FROM favorites 
       WHERE story_id IN ('".addslashes($_REQUEST['storyid'])."', '".addslashes($_REQUEST['storyid2'])."', '".addslashes($_REQUEST['exclude'])."') 
       GROUP BY auth_id 
       HAVING Count(IF(story_id = '".addslashes($_REQUEST['exclude'])."', 1, NULL)) = 0 AND Count(*) = 2 
      ) ufv ON fv.auth_id = ufv.auth_id 
     WHERE story_id != '".addslashes($_REQUEST['storyid'])."' AND story_id != '".addslashes($_REQUEST['storyid2'])."' 
     GROUP BY fv.story_id 
     ORDER BY COUNT(*) DESC 
     LIMIT 25 
    ) fv ON s.story_id = fv.story_id 
ORDER BY fv.cnt DESC, `story_words` DESC