Memory device, memory system including the memory device, and operating method of the memory system

Abstract

There is provided a memory device including a memory controller with reduced power consumption. The memory device includes a first volatile memory including a first logical memory device and a CXL memory controller that controls operations of the first volatile memory and receive requests for the first volatile memory from a host through a CXL interface including a CXL switch. The CXL memory controller includes a coarse-grained global counter configured to count a number of requests received store a count value, a global hotness monitor configured to determine, based on respective ones of the count values, whether each memory unit is a hot unit or a cold unit, a hotness tracker controller configured to generate a first bitmap and a first hotness tracker configured to determine, based on the first bitmap, whether data stored in each of the plurality of segments included in the first logical memory device is hot.