Resource Group Management Statements MySQL supports creation and management of resource groups, and permits assigning threads running within the server to particular groups so that threads execute according to the resources available to the group. This section describes the SQL statements available for resource group management. For general discussion of the resource group capability, see Section 5.1.16, “Resource Groups” . 13.7.2.1 ALTER RESOURCE GROUP Statement ALTER RESOURCE GROUP  group_name [VCPU [=]  vcpu_spec  [,  vcpu_spec ] ...] [THREAD_PRIORITY [=]  N ] [ENABLE|DISABLE [FORCE]] vcpu_spec : { N  |  M  -  N } ALTER RESOURCE GROUP  is used for resource group management (see Section 5.1.16, “Resource Groups” ). This statement alters modifiable attributes of an existing resource group. It requires the RESOURCE_GROUP_ADMIN  privilege. group_name  identifies which resource group to alter. If the group does not exist, an error occurs. The attributes for CPU affinity, priority, and whether the group is enabled can be modified with  ALTER RESOURCE GROUP . These attributes are specified the same way as described for  CREATE RESOURCE GROUP  (see Section 13.7.2.2, “CREATE RESOURCE GROUP Statement” ). Only the attributes specified are altered. Unspecified attributes retain their current values. The  FORCE  modifier is used with  DISABLE . It determines statement behavior if the resource group has any threads assigned to it: •If  FORCE  is not given, existing threads in the group continue to run until they terminate, but new threads cannot be assigned to the group. •If  FORCE  is given, existing threads in the group are moved to their respective default group (system threads to  SYS_default , user threads to  USR_default ). The name and type attributes are set at group creation time and cannot be modified thereafter with  ALTER RESOURCE GROUP . Examples: •Alter a group CPU affinity: •Alter a group thread priority: •Disable a group, moving any threads assigned to it to the default groups: ALTER RESOURCE GROUP rg1 VCPU = 0-63; ALTER RESOURCE GROUP rg2 THREAD_PRIORITY = 5; ALTER RESOURCE GROUP rg3 DISABLE FORCE; CREATE RESOURCE GROUP  group_name TYPE = {SYSTEM|USER} [VCPU [=]  vcpu_spec  [,  vcpu_spec ] ...] 13.7.2.2 CREATE RESOURCE GROUP Statement Resource group management is local to the server on which it occurs.  ALTER RESOURCE GROUP statements are not written to the binary log and are not replicated. 2883