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请教板板 为什么有些字段索引后反而更加影响查询速度

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Release： 2016-06-13 12:14:08
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请问板板 为什么有些字段索引后反而更加影响查询速度
请问板板 为什么有些字段索引后反而更加影响查询速度

------解决思路----------------------
索引不会渐慢查询速度，但会影响插入和修改的速度
------解决思路----------------------
加了索引只會>=沒加索引的查詢速度。不會比不加慢的。
但會影響插入和更新速度。

你這種情況估計是服務器CPU佔用不同導致。

Related labels：
cpu gt nbsp
source：php.cn
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