Date: Fri, 28 Oct 2016 11:01:37 -0400 From: Anton Yuzhaninov <citrin+bsd@citrin.ru> To: freebsd-questions@freebsd.org Subject: Re: Bhyve on freebsd11 Message-ID: <0587c603-7d6d-077b-f692-79d8000aa785@citrin.ru> In-Reply-To: <43349.128.135.52.6.1477665086.squirrel@cosmo.uchicago.edu> References: <mailman.97.1477656002.9771.freebsd-questions@freebsd.org> <VI1PR02MB0974612AD0F70F81D7B28243F6AD0@VI1PR02MB0974.eurprd02.prod.outlook.com> <CADZMNXLDT7MBdsTd10_Q9Hp-eZauRWkGKrxKTqD851JpanxN_Q@mail.gmail.com> <F15FAFF48D97446F9A7451FE8F3D0C68@RIVENDELL> <CADZMNXL1K0Zd5NtP1Pr2Va6PZC4DH72NKVeA9ODPi=PHVfM_Qw@mail.gmail.com> <43349.128.135.52.6.1477665086.squirrel@cosmo.uchicago.edu>
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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).
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