This topic lists the default and valid values for the number of physical CPU cores and the number of threads per core of compute optimized instance families. 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 c7a 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.c7a.large 2 1 2 1, 2
ecs.c7a.xlarge 4 2 2 1, 2
ecs.c7a.2xlarge 8 2, 4 2 1, 2
ecs.c7a.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c7a.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c7a.16xlarge 64 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 2 1, 2
ecs.c7a.32xlarge 128 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, 54, 56, 58, 60, 62, 64 2 1, 2

Default and valid values for the number of physical CPU cores and the number of threads per core of the c7 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.c7.large 2 1 2 1, 2
ecs.c7.xlarge 4 2 2 1, 2
ecs.c7.2xlarge 8 2, 4 2 1, 2
ecs.c7.3xlarge 12 2, 4, 6 2 1, 2
ecs.c7.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c7.6xlarge 24 2, 4, 6, 8, 10, 12 2 1, 2
ecs.c7.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c7.16xlarge 64 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 2 1, 2
ecs.c7.32xlarge 128 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, 54, 56, 58, 60, 62, 64 2 1, 2

Default and valid values for the number of physical CPU cores and the number of threads per core of the c7t 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.c7t.large 2 1 2 1, 2
ecs.c7t.xlarge 4 2 2 1, 2
ecs.c7t.2xlarge 8 2, 4 2 1, 2
ecs.c7t.3xlarge 12 2, 4, 6 2 1, 2
ecs.c7t.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c7t.6xlarge 24 2, 4, 6, 8, 10, 12 2 1, 2
ecs.c7t.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c7t.16xlarge 64 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 2 1, 2
ecs.c7t.32xlarge 128 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, 54, 56, 58, 60, 62, 64 2 1, 2

Default and valid values for the number of physical CPU cores and the number of threads per core of the c6t 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.c6t.large 2 1 2 1, 2
ecs.c6t.xlarge 4 2 2 1, 2
ecs.c6t.2xlarge 8 2, 4 2 1, 2
ecs.c6t.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c6t.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c6t.13xlarge 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 2 1, 2
ecs.c6t.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 c6a 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.c6a.large 2 1 2 1, 2
ecs.c6a.xlarge 4 2 2 1, 2
ecs.c6a.2xlarge 8 2, 4 2 1, 2
ecs.c6a.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c6a.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c6a.16xlarge 64 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 2 1, 2
ecs.c6a.32xlarge 128 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, 54, 56, 58, 60, 62, 64 2 1, 2

Default and valid values for the number of physical CPU cores and the number of threads per core of the c6e 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.c6e.large 2 1 2 1, 2
ecs.c6e.xlarge 4 2 2 1, 2
ecs.c6e.2xlarge 8 2, 4 2 1, 2
ecs.c6e.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c6e.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c6e.13xlarge 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 2 1, 2
ecs.c6e.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 c6 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.c6.large 2 1 2 1, 2
ecs.c6.xlarge 4 2 2 1, 2
ecs.c6.2xlarge 8 2, 4 2 1, 2
ecs.c6.3xlarge 12 2, 4, 6 2 1, 2
ecs.c6.4xlarge 16 2, 4, 6, 8 2 1, 2
ecs.c6.6xlarge 24 2, 4, 6, 8, 10, 12 2 1, 2
ecs.c6.8xlarge 32 2, 4, 6, 8, 10, 12, 14, 16 2 1, 2
ecs.c6.13xlarge 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 2 1, 2
ecs.c6.26xlarge 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