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On 10/28/16 10:31, Valeri Galtsev wrote:
> I'm always amused seeing people run 32 bit system on 64 bit hardware. Can
> anyone offer any rationale behind that?

- 64bit binaries consume more space on disk than 32bit ones.
- 64bit processes consume more RAM, than 32bit ones.

Indeed, 32 bit system suffer from the limit on address space (4 Gb), 
which is statically divided between kernel (KVA_PAGES) and userspace. 
And userspace address space is further divided:
http://docs.FreeBSD.org/cgi/mid.cgi?200207291839.g6TIduVw055637

On amd64 address space so big that your can forget about KVA limit or 
limit on mmap size.

I think 32bit OS is reasonable choose for workstation with RAM < 3Gb. 
And even for small servers (like router on Soekris board with 512Mb RAM).