mysql一个表存多少数据才是性能最高的
? ? ? 之前一直不知道InnoDB表中存多少行数据才是性能最高的 ? ? ? 所以问了一些人，也都没有定论；某国内最大的电子商务公司的DBA给了我一个大致的答案，感觉靠谱。所以就在这里和大家一起分享一下。 ? ? ? ? 1. 某国个大牛写了下面这么一段话： ? ? ? ? 注
? ? ? 之前一直不知道InnoDB表中存多少行数据才是性能最高的
? ? ? 所以问了一些人，也都没有定论；某国内最大的电子商务公司的DBA给了我一个大致的答案，感觉靠谱。所以就在这里和大家一起分享一下。
?
? ? ? 1. 某国个大牛写了下面这么一段话：
?
? ? ? 注：非官方给出的公式
?
?
? ? ? 2. 按照上面的理论，那么我们计算一下bigint为主键表的最大理论行数
? ? ? ? ? 公式1 : (16KB -200) / 8 = 2023 行
? ? ? ? ? 公式2 : 当然，也可以这么算：(16KB)/8 - 200 = 1848行
? ? ? ? ? 因为mysql最高的索引树为三层（表为第一层），那行最大的行数应该为 2023 * 2023= 4092529 行 或 1848 * 1848 = 3415104 行
?
?
因为笔者自己也没有本身测试过，都只是五百万行一分表，听圈里人都说500W是经验值所以笔者也就没有深入的去研究过了。等笔者有时间空了，好好的测试一下，呵呵~
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