Understanding a User Context and a Roll Area

[sukishan]

Understanding a User Context
A user context is memory that is allocated to contain the characteristics of a user that is logged on the R/3 system. It holds information needed by R/3 about the user, such as:

The user's current settings
The user's authorizations
The names of the programs the user is currently running
When a user logs on, a user context is allocated for that logon. When they log off, it is freed. It is used during program processing, and its importance is described further in the following sections.

Understanding a Roll Area
A roll area is memory that is allocated by a work process for an instance of a program. It holds information needed by R/3 about the program's execution, such as:

The values of the variables
The dynamic memory allocations
The current program pointer
Each time a user starts a program, a roll area is created for that instance of the program. If two users run the same program at the same time, two roll areas will exist-one for each user. The roll area is freed when the program ends.