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。