Each instance has a workload manager thread that is responsible for calculating the load on the current instance and sending that information to the other instances in the cluster. The workload manager is a system-service thread; it is spawned when the instance starts.
Adaptive Server uses a workload measurement algorithm to calculate a load score for each instance. This load score is a unitless number that can be compared with other load scores to determine relative workloads. Thus, you can compare load scores across a cluster or at different times for a particular cluster. A load score is meaningful only when compared to other load scores.
