Priority Scheduler is a workload-management facility that controls access to system resources by the different active jobs in Teradata Database. It allows administrators to define different priorities for different categories of work, and comes with a number of flexible options.
Note: The information in this chapter applies only to Teradata Database systems running on SUSE Linux Enterprise Server (SLES) 10. On SLES 11 systems, Priority Scheduler is managed by Teradata Active System Management (TASM), and is configured and monitored using the Teradata Viewpoint workload management portlets. For more information on those portlets, see Teradata Viewpoint User Guide.
Priority Scheduler does the following:
Priority Scheduler includes default parameters that provide four priority levels with all users assigned to one level. To take advantage of Priority Scheduler capabilities, do the following:
The first part of this chapter generally describes the structure and relationships of the scheduling components and parameters. The second part describes schmon, a command-line interface to Priority Scheduler. For detailed information, see “Schmon Utility (schmon) (SLES 10 only)” on page 725.
Note: If Workload Definitions have been set in the Teradata Viewpoint Workload Designer portlet, schmon cannot be used to make changes to Priority Scheduler.