1. A memory having instructions stored thereon that, in response to execution by a processing device, cause the processing device to perform operations comprising: determining whether to associate a first memory object of a memory array with a second memory object of the memory array; retaining first information about a memory region that includes the first memory object and the second memory object in response to determining to associate the first memory object with the second memory object; wherein the first information includes at least an assigned power level classification of the memory region; and controlling power settings of a portion of the memory array at a granularity finer than rank level based on the retained first information.