InnoDB和 MyISAM
总结：1.MyISAM 不支持主外键及事务，InnoDB支持
- 高并发，InnoDB更适合
- MyISAM 至缓存索引，不缓存真实数据；InnoDB不仅缓存索引还缓存数据
- 表空间：MyISAM 小，InnoDB大
关注点不同：MyISAM 注重性能，InnoDB注重事务；
Mysql存储引擎
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