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首先确定，在mysql的'plugin_dir'下有ha_innodb_plugin.so和ha_innodb.so两个文件
查询'plugin_dir'的路径可以用以下命令
mysql> show variables like 'plugin_dir';
+---------------+-----------------------------------+ | Variable_name | Value | +---------------+-----------------------------------+ | plugin_dir | /usr/local/mysql/lib/mysql/plugin | +---------------+-----------------------------------+ 1 row in set (0.01 sec)如果没有找到，在您的mysql编译目录里有下面的目录文件(内置的innodb和innodb_plugin)
storage/innobase/.libs/ha_innodb.so storage/innodb_plugin/.libs/ha_innodb_plugin.so 您需要把它们(ha_innodb_plugin.so和ha_innodb.so)拷贝到mysql的plugin目录中(/usr/local/mysql/lib/mysql/plugin) 接下来就是在mysql命令行安装一下------------------------------------------------------------------------- 华丽的分割线，转载者注释：上面可以忽略
# mysql
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 18 Server version: 5.1.36-log Source distributionType 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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 | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | +------------+---------+-----------------------------------------------------------+--------------+------+------------+ 4 rows in set (0.00 sec)mysql> INSTALL PLUGIN InnoDB SONAME 'ha_innodb.so';
Query OK, 0 rows affected (0.69 sec)mysql> show engines;
+------------+---------+------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +------------+---------+------------------------------------------------------------+--------------+------+------------+ | InnoDB | YES | Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | CSV | YES | CSV storage engine | NO | NO | NO | | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | +------------+---------+------------------------------------------------------------+--------------+------+------------+ 5 rows in set (0.00 sec)OK,大功告成
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