SAP Basis

Unit 9: Scheduling Background Tasks ADM100
You can also specify a time period during which the job should be executed.
To do this, you specify a time after which the job should no longer be
executed. With this function, you prevent periodic jobs being executed at
an undesirable time, among other things. For example, a reorganization
job that should only be executed at night is delayed. With a start time
window, you can avoid this job being executed during the day, when the
dialog users are active and there are fewer system resources available.
Load Balancing
The profile parameter rdisp/bctime specifies the time period in which the
time-dependent job scheduler is active (see the next figure). The execution
of jobs with the start condition immediate usually avoids the time-based
scheduler. In this case, the dialog work process of the scheduling user
performs the job scheduling. Only if no free resources are found, is the job
concerned scheduled in a time-based way. The scheduled start time then
corresponds to the time point at which it should have started.
Figure 100: Scheduling Jobs and Load Balancing
Background work processes can be configured on every instance of the
SAP system using the profile parameter rdisp/wp_no_btc.
The number of background work processes required in the SAP system
depends on the number of tasks to be performed in the background. If the
transport system is used, there must be at least two background work
processes in the system.
314 © 2003 SAP AG. All rights reserved. 2003/Q3