Application Servers with Up to 50 Users (UNIX)
The values listed in the following table for the host systems and server should ensure the best possible operation of your SAP application sever for up to 50 users.
Main Memory and Swap Space on the Host System
|
Resource |
SAP Recommendation |
|
Size of swap space |
Minimum: the greater of the 2 following numbers:
Recommendation: 3 GB |
|
Main memory |
Minimum: 512 MB (without a database) You will achieve performance advantages with a larger main memory.Recommendation: 768 MB This value is recommended for hosts where only one SAP server runs. If you install the database system or other servers on a host, contact the Hardware Competence Center or your system consultant. |
SAP Profile Parameters
Profile Parameters of Memory Management describes what each parameter does.|
Parameter |
Recommended Value |
| abap/heaplimit |
20000000 (20 mil. bytes) |
| abap/heap_area_dia |
200000000 (200 mil. bytes) |
| abap/heap_area_nondia |
|
| abap/heap_area_total: Heap Memory Limit |
2000000000 (2 GB) |
| em/initial_size_MB: Extended Memory Pool Size |
5 MB per active user + 1.5 MB per user; minimum 256 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 |
32768 (32768 8KB blocks) |
| rdisp/ROLL_SHM: Roll Buffer Size |
4096 blocks or 1 MB per active user up to a maximum of 12,500 blocks (100 MB), unless more memory is required (analysis with Transaction ST02) |
| rdisp/PG_MAXFS: Maximum Size of the SAP Paging File |
32768 (32768 8KB blocks) |
| rdisp/PG_SHM: Size of the Paging Buffer |
4096 blocks (25 blocks, per user) |
| ztta/roll_area: Roll Area |
6500000 (6.5 mil. bytes) |
| ztta/roll_first: Size of the Initial Allocation from the Roll Area |
1000000 (1 mil. bytes) If more than the maximum (5 MB per user, 256 MB) extended memory is available (em/initial_size_MB), you can set this value to 1 (1 byte). |
| ztta/roll_extension: Limit for Extended Memory |
128000000 (128 mil. bytes) except for background servers under IBM AIX and Siemens-Nixdorf SINIX. For more information, please consult the parameter documentation |
The settings listed here are recommended base values that you may however, have to change if you monitor and optimize your SAP System. For more detailed information, see
Monitoring the Memory Management System and Profile Parameters of Memory Management.
Check the changes to the system profiles using the program sappfpar. For more information, see
Checking the Hardware and Operating System of the Host System.