InnoDB存储引擎简介
前言：
存储引擎是数据库的核心，对于 MySQL 来说，存储引擎是以插件的形式运行的。虽然 MySQL 支持种类繁多的存储引擎，但常用的当属 InnoDB 了，本篇文章将主要介绍 InnoDB 存储引擎相关知识。
1. InnoDB 简介
MySQL 5.5 版本以后，默认存储引擎就是 InnoDB 了。 InnoDB 是一种兼顾了高可靠性和高性能的通用存储引擎。在 MySQL 5.7 中，除非你配置了其他默认存储引擎，否则执行 CREATE TABLE 不指定 ENGINE 的语句将创建一个 InnoDB 表。
# 查看MySQL支持的存储引擎
mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| CSV | YES | CSV storage engine | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
# 查看默认存储引擎
mysql> show variables like 'default_storage_engine';
+------------------------+--------+
| Variable_name | Value |
+------------------------+--------+
| default_storage_engine | InnoDB |
+------------------------+--------+相关文章