Tuning SAP Buffers
Tuning SAP Buffers
Definiton
It is beneficial to keep as much data buffered as possible. This helps avoid repetitive database accesses, for example from the network and Interprocess Communication (IPC), and maximize system performance.
Reduced performance is caused by
The required data cannot be stored in the buffers. Instead, objects have to be
Memory is wasted. Paging may occur if too much memory is taken from the operating system and allocated to the SAP buffers and database.
You should check regularly whether the buffer size is suited to your system requirements. Since buffers are crucial for the performance of the SAP System, all buffers (except the SAP cursor cache) should be
adjusted to their optimal value.The optimum size for each buffer depends largely on the specific configuration of the server, that is, the applications, the number of users working in each module, and so on. Therefore, it is difficult to specify values suitable for all configurations. The most important criterion for the correct buffer size is the
buffer quality.
You should not adjust buffers in cases where
Buffer Tuning Checklist
If there is insufficient memory to set the appropriate buffer sizes, you should consider adding physical memory. However, since this could take some time, you may have to decide which buffers are most important and should be adjusted first using the existing memory.
As a guideline, the most important buffers are those that:
These criteria give you the following priority list:
See also:
High Buffer Quality How Much Operating System Paging is Acceptable? Directory Space and Data Space Adjusting Pool Sizes Special Aspects of Tuning