Application Server with over 50 Users (iSeries)
The correct configuration for the memory management system in large SAP Web Application Server depends on the several factors. SAP cannot, therefore, give any recommendations for standard configuration. However, you can calculate your own approximate values by referring to the information in this section and in the other sections that are referred to.
To determine the required resources for the host system, contact the SAP Competence Center of your hardware partner Then you can configure the SAP Web Application Server by setting the memory management parameters in the SAP System profile.
Main and Unprotected Storage on the Host System
|
Resource |
SAP Recommendation |
|
Free auxiliary storage |
Minimum: The greater of the following two values:
In either case, this must be greater than the sum of:
|
|
Main storage |
Guidelines: Central system with all services, no database: 180 MB plus 5.7 MB per active user or at least 512 MBWith database: Add 150 MB plus 0.3 MB per active user Application server: 120 MB plus 5.3 MB per active user An increase in storage improves performance. Please also contact your hardware partner or the SAP Competence Center of your hardware partner. |
Profile Parameters
For information about how the various parameters are used, see
Profile Parameters of Memory Management.|
Parameter |
Recommended Value |
| abap/heaplimit: Work Process Restart |
40000000 (40 mil. bytes) |
| abap/heap_area_dia: Heap Memory Limit for Dialog Work Processes |
2000000000 (2 GB) |
| abap/heap_area_nondia: Heap Memory Limit for Non-Dialog Work Processes |
See parameter documentation. |
| abap/heap_area_total: Heap Memory Limit |
2000000000 (2 GB); see parameter documentation. |
| em/initial_size_MB: Extended Memory Pool Size |
5 MB per active user + 1.5 MB per user; Minimum 1024 MB |
| em/stat_log_size_MB: Statistics - User Context Size |
20 |
| em/stat_log_timeout: Statistics - User Context Size |
600 |
| rdisp/ROLL_MAXFS: Maximum Roll File Size |
0 |
| rdisp/ROLL_SHM: Roll Buffer Size |
0 |
| rdisp/PG_MAXFS: Maximum Size of the SAP Paging File |
32768 (The same value as rdisp/PG_SHM) |
| rdisp/PG_SHM: Paging Buffer Size |
32768 |
| ztta/roll_area: Roll Area |
Set automatically |
| ztta/roll_first: Initial Allocation Size from the Roll Area |
Set automatically |
| ztta/roll_extension: Extended Memory Limit |
20000000000 (2 GB) |
The settings listed here are recommended base values that you may, however, have to change when you monitor or optimize your SAP System. For more information, see
Check the changes to the system profiles using the program rspfpar. For more information, see
Operating System and Hardware Prerequisites.