计算innodb_buffer_pool使用率

两种方法：

一、通过show status

mysql> show status like 'innodb_buffer_pool_pages_data';+-------------------------------+---------+| Variable_name                 | Value   |+-------------------------------+---------+| Innodb_buffer_pool_pages_data | 3226366 |+-------------------------------+---------+1 row in set (0.00 sec)mysql> show status like 'innodb_buffer_pool_pages_total';+--------------------------------+---------+| Variable_name                  | Value   |+--------------------------------+---------+| Innodb_buffer_pool_pages_total | 3244032 |+--------------------------------+---------+1 row in set (0.00 sec)

val=innodb_buffer_pool_pages_data/innodb_buffer_pool_pages_total x 100%=3226366/3244032 x 100%=99.46%

二、通过SQL查看

mysql> select * from performance_schema.global_status where variable_name in ('innodb_buffer_pool_pages_data','innodb_buffer_pool_pages_total');+--------------------------------+----------------+| VARIABLE_NAME                  | VARIABLE_VALUE |+--------------------------------+----------------+| Innodb_buffer_pool_pages_data  | 3226437        || Innodb_buffer_pool_pages_total | 3244032        |+--------------------------------+----------------+2 rows in set (0.00 sec)

val=innodb_buffer_pool_pages_data/innodb_buffer_pool_pages_total x 100%=3226437/3244032 x 100%= 99.46%