RESOURCE_GROUPS
警告:
资源管控是 TiDB 在 v6.6.0 中引入的实验特性,其语法或者行为表现在 GA 前可能会发生变化。
RESOURCE_GROUPS
表展示所有资源组 (resource group) 的信息,见使用资源管控 (Resource Control) 实现资源隔离。
USE information_schema;
DESC resource_groups;
+------------+-------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+-------------+------+------+---------+-------+
| NAME | varchar(32) | NO | | NULL | |
| RU_PER_SEC | bigint(21) | YES | | NULL | |
| BURSTABLE | varchar(3) | YES | | NULL | |
+------------+-------------+------+------+---------+-------+
3 rows in set (0.00 sec)
示例
mysql> CREATE RESOURCE GROUP rg1 RU_PER_SEC=1000; -- 创建资源组 rg1
Query OK, 0 rows affected (0.34 sec)
mysql> SHOW CREATE RESOURCE GROUP rg1; -- 显示 rg1 资源组的定义
+----------------+---------------------------------------------+
| Resource_Group | Create Resource Group |
+----------------+---------------------------------------------+
| rg1 | CREATE RESOURCE GROUP `rg1` RU_PER_SEC=1000 |
+----------------+---------------------------------------------+
1 row in set (0.00 sec)
mysql> SELECT * FROM information_schema.resource_groups WHERE NAME = 'rg1';
+------+------------+-----------+
| NAME | RU_PER_SEC | BURSTABLE |
+------+------------+-----------+
| rg1 | 1000 | NO |
+------+------------+-----------+
1 row in set (0.00 sec)
RESOURCE_GROUPS
表中列的含义如下:
NAME
:资源组名称。RU_PER_SEC
:资源组的回填速度,单位为每秒回填的 Request Unit (RU) 数量。BURSTABLE
:是否允许此资源组超额使用剩余的系统资源。