一般情況下，mysql會默認提供多種存儲引擎,可以通過下面的查看:
1）查看mysql是否安裝了innodb插件。
通過下面的命令結果可知，已經安裝了innodb插件。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
|
mysql> show plugins; +------------+--------+----------------+---------+---------+ | Name | Status | Type | Library | License | +------------+--------+----------------+---------+---------+ | binlog | ACTIVE | STORAGE ENGINE | NULL | GPL | | partition | ACTIVE | STORAGE ENGINE | NULL | GPL | | CSV | ACTIVE | STORAGE ENGINE | NULL | GPL | | MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL | | InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL | | MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL | | MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL | +------------+--------+----------------+---------+---------+ 7 rows in set (0.00 sec) |
----------------------------------------------------------------------
如果發現沒有安裝innodb插件,可以執行下面語句進行安裝：
mysql> install plugin innodb soname 'ha_innodb.so';
----------------------------------------------------------------------
2）查看mysql現在已提供什么存儲引擎:
|
1
2
3
4
5
6
7
8
9
10
11
|
mysql> show engines; +------------+---------+------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +------------+---------+------------------------------------------------------------+--------------+------+------------+ | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | CSV | YES | CSV storage engine | NO | NO | NO | | MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | | InnoDB | YES | Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | +------------+---------+------------------------------------------------------------+--------------+------+------------+ 5 rows in set (0.00 sec) |
3）查看mysql當前默認的存儲引擎:
|
1
2
3
4
5
6
7
|
mysql> show variables like '%storage_engine%'; +----------------+--------+ | Variable_name | Value | +----------------+--------+ | storage_engine | MyISAM | +----------------+--------+ 1 row in set (0.00 sec) |
4）看某個表用了什么引擎(在顯示結果里參數engine后面的就表示該表當前用的存儲引擎):
mysql> show create table 表名;
|
1
2
3
4
5
6
7
8
9
10
11
12
|
mysql> show create table wx_share_log; +--------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +--------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | wx_share_log | CREATE TABLE `wx_share_log` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '微信分享日志自增ID', `reference_id` int(11) NOT NULL COMMENT '推薦的經紀人id', `create_time` datetime NOT NULL COMMENT '創建時間', PRIMARY KEY (`id`) ) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=utf8 | +--------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) |
5）如何將MyISAM庫導成INNODB引擎格式的:
在備份出的xxx.sql文件中把ENGINE=MyISAM全換成ENGINE=INNODB
再次導入就可以了。
6）轉換表的命令:
mysql> alter table 表名 engine=innodb;
有上面可以查到看，本機mysql使用的存儲引擎是默認的MyISAN，由于業務需要，先要將其存儲引擎改為Innodb。
操作記錄如下：
1）以安全模式關閉mysql
[root@dev mysql5.1.57]# mysqladmin -uroot -p shutdown
Enter password:
[root@dev mysql5.1.57]# ps -ef|grep mysql
2）備份my.cnf
[root@dev mysql5.1.57]# cp my.cnf my.cnf.old
3）修改my.cnf配置文件
[root@dev mysql5.1.57]# vim my.cnf
.....
[mysqld] //在這個配置區域添加下面一行，指定存儲引擎為innodb
default-storage-engine = InnoDB
4）刪除/mysql/data目錄下的ib_logfile0，ib_logfile1。刪除或剪切到別處都行。
[root@dev var]# mv ib_logfile0 ib_logfile1 /tmp/back/
5）啟動mysql，登陸mysql驗證存儲引擎是否已切換
[root@dev var]# /Data/app/mysql5.1.57/bin/mysqld_safe --defaults-file=/Data/app/mysql5.1.57/my.cnf &
|
1
2
3
4
5
6
7
|
mysql> show variables like '%storage_engine%'; +----------------+--------+ | Variable_name | Value | +----------------+--------+ | storage_engine | InnoDB | +----------------+--------+ 1 row in set (0.00 sec) |
以上這篇Mysql更換MyISAM存儲引擎為Innodb的操作記錄總結就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持服務器之家。
