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在mysql见表的时候，会遇到选择存储引擎： MyISAM 和 InnoDB 。究竟用哪种存储引擎好呢？
1、MyISAM：表锁；支持全文索引；读并发性能较好。
2、InnoDB：行锁；支持事务，支持 外键 ；写并发性能较好。
实际上，现在大多数的公司里，mysql的规定都是使用InnoDB作为默认存储引擎，除了支持事务和行锁是比较重要的两个原因外，其实MyISAM在实际应用场景中意义也不大，并且一个重要原因是，官方支持力度大。oracle很早就收购了InnoDB，后面又收购了mysql，现在重点发展InnoDB引擎。
另外，MyISAM表锁在并发写操作多时会严重影响读操作。
那InnoDB的在又是怎么弥补读并发和 索引 的问题呢？
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索引现在不应该用mysql本身来解决，应该使用第三方的软件，比如：ES,Sphinx；
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至于读表的性能，从架构和 缓存 等方面完全可以解决，并且技术解决方案非常成熟。
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