Memory Management Temporary Memory on AS/400

Using the following parameters, you can limit the maximum use of the process-specific memory. This in turn limits the maximum use of temporary memory by an R/3 application server.

Consider the following parameters:

Parameters for Controlling the Use of Temporary Memory:

Parameter	Limitation:
ztta/roll_area	Roll area per internal mode
ztta/roll_extension	Extended memory limit per user context
rdisp/PG_SHM	Paging memory per application server
rdisp/PG_MAXFS	Paging memory per application server
abap/heap_area_dia	Heap limit for a dialog work process
abap/heap_area_nondia	Heap limit for a non-dialog work process
abap/heap_area_total	Heap limit for the entire R/3 application server

For more information about the function parameters, see Allocating Memory for User Contexts.

Temporary memory almost completely covers the memory requirements of R/3. The main consumers are:

• Internal buffers with a fixed share (PXA, table buffer, paging buffer)
• R/3 memory management (roll memory, Extended Memory, private memory) with a variable share depending on the number of users logged on and the application type (direct memory requirements)