How to define buffer space value

[Former Member]

Hi All,

We are getting lot of swaps in Program and Export/Import buffer in our SAP system.

We have 64GB RAM available on our server, Now We want to increase buffer spaces in our system but not getting any logic for it.

Please suggest how can we calculate to what value we can increase our buffers.

Kindly also let us know the link between Shared Memory, Extended memory, SAP buffer and system RAM.

Please confirm.

Shivam

[markus_doehr2]

> We are getting lot of swaps in Program and Export/Import buffer in our SAP system.

> We have 64GB RAM available on our server, Now We want to increase buffer spaces in our system but not getting any logic for it.

>

> Please suggest how can we calculate to what value we can increase our buffers.

Tuning a system is an iterative process, there is no real formular available to calculate what is needed.

The program buffer holds the executable form of the programs. Depending on how many different "modules" you use, how many transports are runinng into your system and whether your system is Unicode or not defines the size of that buffer. Our system has a program buffer of 3,000,000 and an export/import buffer of 2,000,000; you mileage may very though.

I would double the size, restart the system and let it run a few days and see what will happen. Then increase it again if it's not enough.

Markus