The optimum parameter settings are dependent on:
· Available hardware resources (main memory and free auxiliary storage)
· System load, that is average or maximum number of active users on an application server
The following table is a guide for setting the profile parameters for the iSeries platform:
Parameter |
Unit |
Default Value |
Recommendation |
Comment |
Bytes |
40000000 (40 MB) |
40 MB |
|
|
Bytes |
2 GB |
Possibly lower depending on application |
|
|
abap/heap_area_dia: Heap Memory Limit for Dialog Work Processes |
Bytes |
2 GB |
2 GB |
|
abap/heap_area_nondia: Heap Memory Limit for Non-Dialog Work Processes |
Bytes |
2 GB |
2 GB |
|
Bytes |
2 GB |
2 GB |
You can use the operating system monitor (ST06) to monitor physical storage and ASP usage. Allocated unprotected temporary storage includes the allocated memory of: · All SAP system instances · Database buffers and processes · Operating system You can look at this in detail using transaction ST02 ® Detail analysis ® Storage. |
|
MB |
4092 |
Minimum 64 MB |
|
|
8 KB blocks |
16384 |
16384 |
Do not define a value higher than 12500 (100 MB) unless the CCMS Tune Summary (Transaction ST02) under Monitoring the Memory Management System states that a larger roll buffer is required. Absolute upper limit: 250000 blocks (2 GB) for special applications |
|
8 KB blocks |
32768 |
32768 |
Absolute upper limit: 250000 blocks (2 GB) for special applications |
|
8 KB blocks |
32768 |
32768 |
Absolute upper limit: 250000 blocks (2 GB) for special applications |
|
8 KB blocks |
32768 |
32768 |
Absolute upper limit: 250000 blocks (2 GB) for special applications |
|
Bytes |
1 byte |
1 byte |
This value is set automatically and cannot be changed. |
|
Bytes |
3 MB |
3 MB |
This value is set automatically and cannot be changed. |
|
KB |
4096 (4 MB) |
4096 (4 MB) |
|