SAP Memory allocation

SAP Memory Allocation.

Here how SAP memory allocation for Work Process.

1. User submits the request.

2. Dispatcher assigns the WP.

3. WP requires memory to Roll-In the user context.

4. WP gets memory from local memory which is defined in the parameter ztta/roll_area. It gets

only a part of it which is defined by parameter ztta/roll_first (20KB).

5. If the allocated memory is not sufficient then it gets allocated from extended memory

ztta/roll_extension.

6. If that is also not sufficient then it uses the remaining ROLL Area.

7. If the Roll Area is also not sufficient then it uses Heap/Private memory and the WP goes into

PRIV (PRIVATE) mode.

8. Heap memory is defined by the parameter