innodb_buffer_pool_size 大小建议

2022-01-31 06:31:14

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)

本文转自birdinroom 51CTO博客，原文链接：http://blog.51cto.com/birdinroom/1602606，如需转载请自行联系原作者