This topic lists the default and valid values for the number of physical CPU cores and the number of threads per core of instance families with local SSDs. You can query these values when you customize CPU options.

Default and valid values for the number of physical CPU cores and the number of threads per core of the i3g instance family

Instance type Default value for the number of vCPUs Valid values for the number of physical CPU cores Default value for the number of threads per core Valid values for the number of threads per core
ecs.i3g.2xlarge 8 2, 4 2 1, 2
ecs.i3g.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.i3g.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.i3g.13xlarge 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 2 1, 2
ecs.i3g.26xlarge 104 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52 2 1, 2

Default and valid values for the number of physical CPU cores and the number of threads per core of the i3 instance family

Instance type Default value for the number of vCPUs Valid values for the number of physical CPU cores Default value for the number of threads per core Valid values for the number of threads per core
ecs.i3.xlarge 4 2 2 1, 2
ecs.i3.2xlarge 8 2, 4 2 1, 2
ecs.i3.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.i3.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.i3.13xlarge 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 2 1, 2
ecs.i3.26xlarge 104 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52 2 1, 2