CREATE RESOURCE GROUP

You can use the CREATE RESOURCE GROUP statement to create a resource group.

Synopsis

CreateResourceGroupStmt:
   "CREATE" "RESOURCE" "GROUP" IfNotExists ResourceGroupName ResourceGroupOptionList

IfNotExists ::=
    ('IF' 'NOT' 'EXISTS')?

ResourceGroupName:
   Identifier

ResourceGroupOptionList:
    DirectResourceGroupOption
|   ResourceGroupOptionList DirectResourceGroupOption
|   ResourceGroupOptionList ',' DirectResourceGroupOption

DirectResourceGroupOption:
    "RU_PER_SEC" EqOpt stringLit
|   "BURSTABLE"

The resource group name parameter (ResourceGroupName) must be globally unique.

TiDB supports the following DirectResourceGroupOption, where Request Unit (RU) is a unified abstraction unit in TiDB for CPU, IO, and other system resources.

If the BURSTABLE attribute is set, TiDB allows the corresponding resource group to use the available system resources when the quota is exceeded.

Examples

Create two resource groups rg1 and rg2.

mysql> DROP RESOURCE GROUP IF EXISTS rg1;
Query OK, 0 rows affected (0.22 sec)
mysql> CREATE RESOURCE GROUP IF NOT EXISTS rg1
    ->  RU_PER_SEC = 100
    ->  BURSTABLE;
Query OK, 0 rows affected (0.08 sec)
mysql> CREATE RESOURCE GROUP IF NOT EXISTS rg2
    ->  RU_PER_SEC = 200;
Query OK, 0 rows affected (0.08 sec)
mysql> SELECT * FROM information_schema.resource_groups WHERE NAME ='rg1' or NAME = 'rg2';
+------+-------------+-----------+
| NAME | RU_PER_SEC  | BURSTABLE |
+------+-------------+-----------+
| rg1  |         100 | YES       |
| rg2  |         200 | NO        |
+------+-------------+-----------+
2 rows in set (1.30 sec)

MySQL compatibility

MySQL also supports CREATE RESOURCE GROUP. However, the acceptable parameters are different from that of TiDB so that they are not compatible.

See also

• DROP RESOURCE GROUP
• ALTER RESOURCE GROUP
• Request Unit (RU)