How can data center operators measure and optimize the efficiency of their cooling systems?

Data center operators can measure the efficiency of their cooling systems using metrics like Power Usage Effectiveness (PUE), Water Usage Effectiveness (WUE), and Cooling Efficiency Ratio (CER). To optimize cooling efficiency, operators should monitor temperature, humidity, and air flow rates, identify areas of inefficiency, and implement corrective actions like adjusting setpoints, optimizing fan speeds, and performing regular maintenance.