Parameter
ztta/roll_area
Short text
Roll area size
Parameter Description
The value specifies the size of the roll area in bytes. The roll area is one of several memory areas from which the memory requirements of user programs are satisfied. For technical reasons, approximately the first 250 KB of a user context is always stored in the roll area, additional data
1) to the limit ztta/roll_first in the roll area, then
2) in extended memory, to the limit ztta/roll_extension or, if extended memory is exhausted, then
3) in the roll area again, until the roll area is full, then
4) in the heap memory (PRIV mode), to the limit abap/heap_area_dia or abap/heap_area_total or until the address space or the swap space is exhausted.
(This allocation sequence applies for dialog work processes. In the case of non-dialog work processes, the sequence 1) 3) 4) 2) applies. After this, terminations occur, with errors such as: STORAGE_PARAMETERS_WRONG_SET or an error code that indicates a memory bottleneck.
Aim
Minimum data transfer with context change; however, the increase helps to avoid problems (address space, swap space, operating system paging)
Parameter Unit
Bytes
Default Value
6500000 (6,5MB) (others)
2000000 (2MB) (Microsoft Windows NT)
Proposed value
6500000 (6.5MB) (others)
2000000 (2MB) (Microsoft Windows NT)
Who is permitted to make changes?
The customer No manual maintenance under Windows NT necessary
Are other parameters affected or dependent?
rdisp/ROLL_SHM
Should be adjusted due to ztta/roll_area
rdisp/ROLL_MAXFS
Must be adjusted due to ztta/roll_area Can be checked using ST02
Operating System Restrictions
None
Database System Restrictions
None
