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查看Mysql索引页碎片_MySQL

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Release： 2016-06-01 13:43:16
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查询索引页碎片:SHOW TABLE STATUS LIKE '表名'; //当Data_free 列值大于0时表示有碎片(只要删除过数据就会产生,前提是有建立索引) 优化表:OPTIMIZE TABLE 表名; 建立索引条件(或):表数据量大(数据量小的话建立索引效果不明显,反而浪费物理空间,增加维护表难度等)主键列/外键列(加快联接)/常用搜索列 查看数据库编码:show variables like 'character_set%';设置返回结果编码:SET character_set_results= utf-8;   作者 897457487 bitsCN.com

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