choice of i386 vs amd64 guest

2016-10-17 Thread Victor Sudakov
Colleagues,

When I must run several FreeBSD guests in bhyve, should I prefer i386
or amd64 guests provided a guest will never need more than 2-3 GB of
RAM? 

The bhyve host is of course amd64.

-- 
Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:suda...@sibptus.tomsk.ru
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Re: choice of i386 vs amd64 guest

2016-10-17 Thread Paul Vixie


Victor Sudakov wrote:
> Colleagues,
> 
> When I must run several FreeBSD guests in bhyve, should I prefer i386
> or amd64 guests provided a guest will never need more than 2-3 GB of
> RAM? 

if you're running bind9, the sizeof(void *) will dominate your heap
size, and a 32-bit guest will be better overall, given that you don't
need the larger addressing size.

for everything else, the larger register set on amd64 will matter more,
and you should probably use a 64-bit guest.

-- 
P Vixie

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