Memory Management
Starting with release 3.0 of R/3, SAP introduced a new concept in its use of main memory to improve the overall performance of the system, in respect to previous Web AS releases (2.2 and earlier). The main change was to make use of an extended memory management system to optimize the access to the user contexts and thus avoid the overhead caused by heavy roll-in/roll-out tasks of previous releases. User context is defined as the user data that are kept by the system between dialog steps to continue the processing of the transaction. The user context contains a user-specific area where user and authorization data are stored as well as a session context for each SAP session. These data contain such things as authorizations, field ...
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