一般情況下，mysql會默認(rèn)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(jié)果可知，已經(jīng)安裝了innodb插件。
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(fā)現(xiàn)沒有安裝innodb插件,可以執(zhí)行下面語句進(jìn)行安裝：
mysql> install plugin innodb soname 'ha_innodb.so';
----------------------------------------------------------------------
2）查看mysql現(xiàn)在已提供什么存儲引擎:
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(dāng)前默認(rèn)的存儲引擎:
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(jié)果里參數(shù)engine后面的就表示該表當(dāng)前用的存儲引擎):
mysql> show create table 表名;
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(jīng)紀(jì)人id',
`create_time` datetime NOT NULL COMMENT '創(chuàng)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(dǎo)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(dǎo)入就可以了。
6）轉(zhuǎn)換表的命令:
mysql> alter table 表名 engine=innodb;
有上面可以查到看，本機(jī)mysql使用的存儲引擎是默認(rèn)的MyISAN，由于業(yè)務(wù)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(guān)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(qū)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(yàn)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
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(jié)就是小編分享給大家的全部內(nèi)容了，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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