SAP memory parameters

Hi Guys,

I am looking for some advice from Basis Gurus regarding SAP/Oracle memory sizing.

We have a HP server with 16G physical memory. I am goign to have an SAP central instance and a 1.2 TeraByte Oracle database server on this one.

I would like some advice regarding the memory sizing, what percentage of physical memory should be allocated to SAP and oracle. In addition to Oracle, we will use Tivoli for monitoring and TDP backups which also will consume memory.

Please give me some perpective about how to approach this subject as have not done this before.

Thanks

Cyrus