mysql修改buffer_pool大小

mysql 5.7 支持在線修改buffer_pool_size

select version();

show VARIABLES like "%buffer_pool_size%";

set global innodb_buffer_pool_size=15032385536;

mycli-TEST20: (none) 15:45:15>select version();
+------------+
| version()  |
+------------+
| 5.7.16-log |
+------------+
1 row in set
Time: 0.030s
mycli-TEST2

mycli-TEST20: (none) 15:45:54>show variables like "%buffer_pool_size%"
+-------------------------+-------------+
| Variable_name           | Value       |
+-------------------------+-------------+
| innodb_buffer_pool_size | 17179869184 |
+-------------------------+-------------+
1 row in set
Time: 0.016s
mycli-TEST20: (none) 15:49:17> set global innodb_buffer_pool_size=15032385536;
Query OK, 0 rows affected
Time: 0.094s

0: (none) 16:19:33>show variables like "%buffer_pool_size%"
+-------------------------+-------------+
| Variable_name           | Value       |
+-------------------------+-------------+
| innodb_buffer_pool_size | 15032385536 |
+-------------------------+-------------+
1 row in set
Time: 0.054s

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https://blog.csdn.net/nanyanglu/article/details/79109838
https://blog.csdn.net/weixin_41782053/article/details/87269158
https://blog.csdn.net/robbin/article/details/83456327