[MySQL 5.6] information_schema.innodb_metrics

1. 概括

已关闭/打开的配置

use information_schema
 
select count(*), status from innodb_metrics group by status;
+----------+----------+
| count(*) | status |
+----------+----------+
| 170 | disabled |
| 65 | enabled |
+----------+----------+

模块

 select count(*), subsystem from innodb_metrics group by subsystem;
+----------+---------------------+
| count(*) | subsystem           |
+----------+---------------------+
|        8 | adaptive_hash_index |
|       75 | buffer              |
|       32 | buffer_page_io      |
|        8 | change_buffer       |
|        4 | compression         |
|        6 | ddl                 |
|        4 | dml                 |
|        1 | file_system         |
|        4 | icp                 |
|        6 | index               |
|       16 | lock                |
|        3 | metadata            |
|        9 | os                  |
|        7 | purge               |
|       15 | recovery            |
|       25 | server              |
|       12 | transaction         |
+----------+---------------------+
17 rows in set (0.00 sec)

模块名与subsystem的对应关系：

设置监控变量

mysql> show variables like "%monitor%";

+————————–+——-+

| Variable_name            | Value |

+————————–+——-+

| innodb_monitor_disable   |       |

| innodb_monitor_enable    |       |

| innodb_monitor_reset     |       |

| innodb_monitor_reset_all |       |

+————————–+——-+

4 rows in set (0.00 sec)

打开/关闭计数器：

mysql> set global innodb_monitor_enable = "adaptive_hash_%";

mysql> set global innodb_monitor_disable = "adaptive_hash_%";

重置值：

mysql> set global innodb_monitor_reset_all = "adaptive_hash_%";

mysql> set global innodb_monitor_reset = "adaptive_hash_%";

查看模块信息

SELECT * FROM INFORMATION_SCHEMA.INNODB_METRICS WHERE subsystem="transaction";