Hardware and Operating System SAP R/3 Basis ... - SAP Techies

Introduction To SAP R/3 Basis
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User Context Data & Roll-in, Roll-out
In an R/3 system, many frontend users are connected to one or more application
servers. The work that users request from the system is performed in work
processes. Normally, there are fewer work processes than frontend users.
A work process is dedicated to a frontend user only while a specific dialog
step is being processed by the application server. A user can be dispatched to
one work process in one dialog step, and to another work process in the
following dialog step. Over the course of time, users are dispatched to different
work processes.
In the course of their work in dialog work processes, users accumulate
various pieces of data, such as pointers to programs they are using. This
accumulated data is called the "user context". A user context enables, for
example, the material number you are working on to be remembered by the
system and proposed as the default in a following transaction.
Roll Area and Paging Area
The data processed in work processes is stored in two memory areas:
The roll area, in which user context data is stored. User context data may
include pointers to
active programs, set/get parameters (related to the most recent input of the
user), authorizations,internal tables, and report lists.
The paging area, which stores the application program data that correspond to
specific ABAP commands including EXTRACT, IMPORT TO MEMORY,
EXPORT FROM MEMORY, and CALL TRANSACTION.
The size of these areas is configurable using R/3 profile parameters.
Compiled By: Ashwin Vavaiya 34 of 44