What is WLM?

WLM typically refers to Workload Manager, a feature in operating systems or middleware that manages and prioritizes workloads to optimize resource utilization and system performance. It dynamically allocates resources such as CPU, memory, and I/O bandwidth based on predefined policies and service level agreements (SLAs). It is commonly used in mainframe environments (like IBM's z/OS WLM) and distributed computing systems to ensure critical applications receive the necessary resources and to prevent resource contention. Another technology that could be referred to as WLM is IBM's Workload Lender, which lets one system borrow capacity from another.