Mysql中的默認(rèn)存儲引擎
Mysql在V5.1之前默認(rèn)存儲引擎是MyISAM;
在此之后默認(rèn)存儲引擎是InnoDB
查看默認(rèn)存儲引擎
查看當(dāng)前mysql默認(rèn)引擎: show variables like '%engine%';
mysql> show variables like '%engine%'; +----------------------------------+--------+ | Variable_name | Value | +----------------------------------+--------+ | default_storage_engine | InnoDB | | default_tmp_storage_engine | InnoDB | | disabled_storage_engines | | | internal_tmp_disk_storage_engine | InnoDB | +----------------------------------+--------+ 4 rows in set (0.00 sec)
查看mysql支持哪些引擎:show engines;
- Engine是引擎名字,
- Support 顯示Innodb是DEFAULT默認(rèn)的;
- Commnet是簡單描述
- Transactions: 是否支持事物
mysql> show engines; +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ | CSV | YES | CSV storage engine | NO | NO | NO | | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | MyISAM | YES | MyISAM storage engine | NO | NO | NO | | BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO | | PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | ARCHIVE | YES | Archive storage engine | NO | NO | NO | | InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL | +--------------------+---------+----------------------------------------------------------------+--------------+------+------------+ 9 rows in set (0.00 sec)
修改默認(rèn)存儲引擎
如果修改本次會話的默認(rèn)存儲引擎(重啟后失效),只對本會話有效,其他會話無效:
mysql> set default_storage_engine=innodb; Query OK, 0 rows affected (0.00 sec)
修改全局會話默認(rèn)存儲引擎(重啟后失效),對所有會話有效
mysql> set global default_storage_engine=innodb; Query OK, 0 rows affected (0.00 sec)
希望重啟后也有效,即編輯/etc/my.cnf,[mysqld]下面任意位置添加配置;(所有對配置文件的修改,重啟后生效)
default-storage-engine = InnoDB
總結(jié)
以上為個人經(jīng)驗(yàn),希望能給大家一個參考,也希望大家多多支持腳本之家。
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