absolute crapton of memory, several times what you actually need
Err, you mean every rack-mount system since around 2000s? Seriously, the commissioning overhead for virtually anything exceeds the "max out the ram" tax. Unless you're a cloud provider commissioning autonomously and operating at excessive scale seeking some particular unit cost optimization ... and even then not maxing out RAM (to some current definition of effective price:performance maxima) would be odd.
Err, you mean every rack-mount system since around 2000s? Seriously, the commissioning overhead for virtually anything exceeds the "max out the ram" tax. Unless you're a cloud provider commissioning autonomously and operating at excessive scale seeking some particular unit cost optimization ... and even then not maxing out RAM (to some current definition of effective price:performance maxima) would be odd.