SAP Basis

ADM100 Lesson: Background Processing: Other Topics
Lesson:
284
Background Processing: Other Topics
Lesson Duration: 45 minutes
Lesson Overview
In this lesson, you will learn about other, special functions for background
processing.
Lesson Objectives
After completing this lesson, you will be able to:
• Use additional, special functions of background processing
This lesson addresses “advanced” background processing topics. The
prerequisite for understanding and using the topics is a good grounding in
the basics of background processing.
See the additional notes in the individual sections.
Business Example
You want to use the background processing resources more efficiently.
Reservation for Class “A” Jobs
Use the example in the training material to explain why the background
performance of the SAP system can become dramatically worse when
“reservation” is used. Extreme example: During a 10 hour night, ten
background work processes of a system should perform work with a scope
of 70 hours (of which 65 hours are class “C” tasks). This would meant that
70% of the background resources were used. However, if five of the ten
background work processes were now reserved for class “A” jobs, there
wouldonlybe50“classChours”availablefortherequired65“classC
hours”. The consequence: unprocessed background tasks in the morning.
In normal operation, every background work process processes jobs of
every priority.
You can, however, reserve as many of the configured background work
processes as desired for high priority jobs; that is, class “A” jobs. The
reservation of work processes for class “A” jobs does not reserve any
particular work processes. Rather it ensures that a particular number of
2003/Q3 © 2003 SAP AG. All rights reserved. 333