sap abap/heap_area_dia: Heap Memory Limit for Dialog Work Processes

Use

Set the limit for the heap memory ( Private Memory) that an R/3 dialog work process can allocate. This ensures that enough swap space is available.

If the value is exceeded, the user context that was just executed is terminated prematurely.

In IBM AIX systems, specify a value for this parameter smaller than 200 MB, since the shared memory areas under AIX have a limited size. A higher value has no advantages and no effects.

Goal:

Prevent a single dialog work process (user context) from filling up the entire heap memory of the application server.

A work process from an application server can allocate only so much heap memory as specified in parameter abap/heap_area_total. The limit specified in the parameter refers to the combined heap memory usage of all work processes for an application server.

Ensure that the value is high enough to fulfill all the regular memory requirements, but is not so high that the work process runs up against the swap space limit of the operating system. See the graphic in Abap/Heaplimit: Work Process Restart.

Activities

Unit: Bytes

Default value: 80000000 (80 MB)

Recommended value: 2 GB, if the operating system does not set a lower limit. You can find values in the configuration examples (Content button).

Changes: Customers can make changes.