The SRM software is the Sun resource management extension for the Solaris operating environment and should be used when more advanced resource management and control is required.
For example, two workloads can be consolidated onto a single system using processor sets to manage the CPU resource by allocating 10 processors to workload A and 8 processors to workload B. Although this would provide processor limits for each workload, resources could be potentially wasted if one of the workloads is not using all of its share of the processors because the spare CPU cannot be used by any other workload.
The SRM software provides the following advantages over base Solaris resource control:
Better utilization of system resources ...