Preventing Swap-Space Bottlenecks (UNIX)
By using the following parameters, you can limit the maximum use of the process-specific memory. This in turn limits the maximum use of swap space by an SAP application server.
Consider the following parameters:
Parameter |
Limits the amount of process-specific memory used... |
abap/heap_area_dia |
...by any particular dialog work process |
abap/heap_area_nondia |
... by any particular non-dialog work process (background, spool, etc.) |
abap/heap_area_total |
...by an SAP application server -- all dialog and non-dialog work processes |
You can find more information on the functions of these parameters under Limits for Allocating Heap Memory in
Functions of the SAP Memory Management System.Normally, only background work processes use a large amount of swap space.
Dialog processes do not usually use a lot of swap space, as long as the following conditions apply:
The following generally applies: the more main memory that an application server has, the better the performance.
For further information, see
Swap Space Bottleneck During SAP System Operation.