Data Segment Size (UNIX) SAP Memory Management
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The data segment size restricts the size of a user context that is executed as an R/3 background job. The default value is 64 MB, which is however, not sufficient and should be increased. Set the data segment size for a process to the following values:
UNIX Operating System | Data Segment Size |
32 bit UNIX systems | Increase data segment size to approx. 600 MB. |
64 bit UNIX systems | Set data segment size to at least 2048 MB. |
Under IBM AIX, the maximum segment size is 256 MB; under Siemens-Nixdorf SINIX the maximum segment size is 384 MB.
You can check data segment sizes using the R/3 test program memlimits. (You must stop the R/3 server to do this.) Note the output row that appears as follows: Process xxxxx allocating. The segment size is displayed in the row Size = .
For more detailed information, also refer to the R/3 installation guide in the section covering UNIX kernel parameters.
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Title : Data Segment Size (UNIX) SAP Memory Management
