Cache size no more than 50% of physical memory?

Hi,

We're running LiveCache 7.9.08 on Windows 2008 R2.

Our current settings are:

PhysMem                          32GB

CacheMemorySize           1678000              

OmsMaxHeapSize           16098400

Data Cache Usage            89%

OMS Data                         87%

HitRate is 99.9% so that is good.

Due to filling level believe we need to increase Cache sizes. I’ve been led to believe total cache should be no more than
50% of physical memory and OMS should be about 75% of total cache. Are these numbers in line with current SAP standards?

If not, what are SAP recommendations?

Thanks,

Heidi