Specifies the required amount for the total memory available for query execution. The difference between this value and the [memory] max_memory_size value defines the target level of performance, which is requested in a container in YARN. The required_num_cores parameter must also be specified.

For more information, see Preemption Support.

Specifies the number of cores required at startup. The difference between this value and the [system] num_cores value defines the target level of performance, which is requested in a container in YARN. The required_max_memory_size parameter must also be specified.

For more information, see Preemption Support.