MySQL系统表空间扩容方法

一、系统表空间扩容方法 方法1：在innodb_data_file_path参数后面加上autoextend参数 innodb_data_file_path=ibdata1:12M:autoextend 方法2：在innodb_data_file_path参数后面加上一个新的数据文件 innodb_data_file_path = /ibdata/ibdata1:988M;/disk2/ibdata2:50M:autoextend 二、操作步骤 1. 修改参数innodb_data_file_path 2. 关闭数据库，shutdown 3. 启动数据库，mysqld_safe & 4. 验证参数是否生效show variables like 'innodb_data_file_path'; 三、案例 1. 查看默认参数 mysql> show variables like 'innodb_data%'; +-----------------------+------------------------+ | Variable_name | Value | +-----------------------+------------------------+ | innodb_data_file_path | ibdata1:12M:autoextend | | innodb_data_home_dir | /zxdata/my3311/data | +-----------------------+------------------------+ 2 rows in set (0.00 sec) 2.关闭数据库 mysql>shutdown; 3.修改my.cnf参数文件 [root@roidb1 ~]# grep "path" /zxdata/my3311/etc/my.cnf innodb_data_file_path = ibdata1:12M;ibdata2:50M:autoextend 4.启动数据库 #/usr/local/mysql/bin/mysqld_safe --defaults-file=/zxdata/my3311/etc/my.cnf & 5.验证是否生效 mysql> show variables like 'innodb_data%'; +-----------------------+------------------------------------+ | Variable_name | Value | +-----------------------+------------------------------------+ | innodb_data_file_path | ibdata1:12M;ibdata2:50M:autoextend | | innodb_data_home_dir | /zxdata/my3311/data | +-----------------------+------------------------------------+ 2 rows in set (0.01 sec)