HP 3000 Manuals HP 3000 Manuals
Introducing the Workload Manager
The Workload Manager gives system managers greater control over CPU
scheduling at the process level than that provided by traditional
scheduling subqueues. As a result, system managers can monitor and
effectively manage system performance. For example, the Workload Manager
allows system managers to provide a designated level of service to their
customers, such as maintaining an average response time or providing a
certain degree of throughput. Or, system managers can use the Workload
Manager to guarantee a minimum percentage of the CPU to a set of users,
or restrict them to a maximum percentage of the CPU.
With this release of MPE/iX, the traditional scheduling subqueues (AS,
BS, CS, DS, and ES) are replaced by five system-defined workgroups. In
addition, system managers can create additional user-defined workgroups
for more discrete partitioning of the system workload. Specifically, you
use the Workload Manager to determine:
* the total number of workgroups on the system
* which processes become members of each workgroup
* the behavior of processes in each workgroup, such as their
priority, how much time a process can have the CPU before it's
interrupted, and so on
* the current workgroup configuration
You may partition the system into as many workgroups as needed to control
the workload. The workgroups can correspond to one department within the
company, such as Finance, or to a group of people performing the same
kind of task, such as all data entry personnel updating one database.
And, since you can observe the behavior of individual workgroups, the
Workload Manager enables you to closely monitor system performance.
You can also implement a new workgroup configuration on the fly or at a
predetermined time, for example, just before a shift change or to handle
scheduled batch jobs. In this way, you can plan for anticipated workload
changes and modify system behavior accordingly.
NOTE There is full programmatic support for the Workload Manager
integrated into MPE/iX. For information about the Architected
Interface calls available to you, consult the MPE/iX Architected
Interface Facility: Operating System Reference Manual, part number
36374-90001.