mysql> SHOW GLOBAL STATUS LIKE 'Innodb_buffer_pool_pages_data'; 

+-------------------------------+-------+| Variable_name                 | Value |+-------------------------------+-------+| Innodb_buffer_pool_pages_data | 1388  |+-------------------------------+-------+1 row in set (0.00 sec)

mysql> SHOW GLOBAL STATUS LIKE 'Innodb_buffer_pool_pages_total';

+--------------------------------+--------+| Variable_name                  | Value  |+--------------------------------+--------+| Innodb_buffer_pool_pages_total | 131071 |+--------------------------------+--------+1 row in set (0.00 sec)

mysql> SHOW GLOBAL STATUS LIKE 'Innodb_page_size';

+------------------+-------+

| Variable_name    | Value |

+------------------+-------+

| Innodb_page_size | 16384 |

+------------------+-------+

1 row in set (0.00 sec)

'Innodb_buffer_pool_pages_data' X 100 / 'Innodb_buffer_pool_pages_total'

当结果 > 95% 则增加 innodb_buffer_pool_size， 建议使用 ram total 75%

当结果 < 95% 则减少 innodb_buffer_pool_size， 建议 'Innodb_buffer_pool_pages_data' X 'Innodb_page_size' X 1.05 / (1024*1024*1024)