The text discusses resource wastage in YARN within Hadoop environments, where 30% to 50% of resources are often underutilized. This wastage is due to memory allocation vs. actual usage, static allocation limitation, and operational impact of wastage. The Pulse Yarn Optimizer is a solution designed to address these inefficiencies by unlocking unused memory in the environment, ensuring that every byte of allocated memory is utilized effectively. It works through continuous monitoring, predictive overcommitment, dynamic reallocation, and safe overcommitment controls. The optimizer transforms underutilized resources into additional computing capacity, saving costs without sacrificing performance, accelerating workloads, and achieving higher ROI. Real-world results show significant improvements in runtime and memory efficiency after optimization.