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POSlow mysql select
 

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  1. POSlow mysql select
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    <p>I have a table with the following structure:</p> <pre><code>CREATE TABLE `game_entries` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `player_id` int(11) unsigned NOT NULL, `game_id` int(11) unsigned NOT NULL, `hero_id` int(11) unsigned NOT NULL, `game_avg_pts` smallint(4) unsigned NOT NULL DEFAULT '0', `game_season` tinyint(2) unsigned NOT NULL, `game_length` smallint(11) unsigned NOT NULL, `game_mode` char(10) NOT NULL, `game_is_tb` tinyint(1) unsigned NOT NULL DEFAULT '0', `game_map` char(10) NOT NULL, `game_date` datetime NOT NULL, `game_playersnum` tinyint(2) NOT NULL, `side` tinyint(2) unsigned NOT NULL, `won` tinyint(1) unsigned NOT NULL DEFAULT '0', `pts` smallint(11) unsigned NOT NULL, `pts_change` smallint(4) NOT NULL, `kills` smallint(4) unsigned NOT NULL DEFAULT '0', `deaths` smallint(4) unsigned NOT NULL DEFAULT '0', `assists` smallint(4) unsigned NOT NULL DEFAULT '0', `creeps` smallint(4) unsigned NOT NULL DEFAULT '0', `towers` tinyint(2) unsigned NOT NULL DEFAULT '0', `deleted_at` datetime DEFAULT NULL, PRIMARY KEY (`id`), UNIQUE KEY `player_game` (`player_id`,`game_id`), KEY `index_game` (`game_id`), KEY `index_player` (`player_id`), KEY `index_hero` (`hero_id`) ) ENGINE=InnoDB AUTO_INCREMENT=11706564 DEFAULT CHARSET=utf8; </code></pre> <p>The table has more than 11M rows. When I try to select all game_entries for a specific player_id, the query takes too long:</p> <pre><code>mysql&gt; SELECT * FROM `game_entries` WHERE player_id = 4; 227 rows in set (1.68 sec) mysql&gt; SELECT * FROM `game_entries` WHERE player_id = 4 LIMIT 25; 25 rows in set (0.27 sec) mysql&gt; EXPLAIN SELECT * FROM `game_entries` WHERE player_id = 4; +----+-------------+--------------+------+--------------------------+-------------+---------+-------+------+-------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+--------------+------+--------------------------+-------------+---------+-------+------+-------+ | 1 | SIMPLE | game_entries | ref | player_game,index_player | player_game | 4 | const | 226 | | +----+-------------+--------------+------+--------------------------+-------------+---------+-------+------+-------+ 1 row in set (0.00 sec) </code></pre> <p>Is there any way to improve the speed of this query?</p>
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    1. UStycooon
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    1. COfirst thing Select fields which are required do not add `* `
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      1. USShakti Singh
 

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