Devices, methods, systems, and computer-readable media for a refrigeration rack monitor are described herein. One or more embodiments include a refrigeration system monitor, comprising a computing device with a memory storing instructions executable by a processor to: monitor real time performance metrics for a refrigeration system, wherein the real time performance metrics are received from temperature sensors, pressure sensors, and power sensors coupled to the refrigeration system, compare the real time performance metrics to a performance curve of devices associated with the refrigeration system, and generate health information for the devices associated with the refrigeration system based on the comparison.