Date: Sat, 29 Sep 2012 01:22:50 +0200 From: Niclas Zeising <zeising@daemonic.se> To: "Matthew D. Fuller" <fullermd@over-yonder.net> Cc: freebsd-fs@freebsd.org, Glen Barber <gjb@freebsd.org>, freebsd-current@freebsd.org, Sami Halabi <sodynet1@gmail.com> Subject: Re: ZFS on HEAD Message-ID: <5066314A.4010309@daemonic.se> In-Reply-To: <20120928194923.GD71113@over-yonder.net> References: <CAEW%2Bogaqr9O-gGieay3ZYKmMOKkEuMrbYeKLhEU=fsOU8HDGzg@mail.gmail.com> <20120928163304.GC1287@glenbarber.us> <CAEW%2BogaFCgG9Cv4=SvHLD7HNzPJy7OFHNzeZ42vabquaKs-G_w@mail.gmail.com> <20120928193758.GC71113@over-yonder.net> <CAEW%2BogYbx9yK=TMJbo=4hravn5=c9yGRjKtbTMP0a8uajhmprg@mail.gmail.com> <20120928194923.GD71113@over-yonder.net>
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On 2012-09-28 21:49, Matthew D. Fuller wrote: > On Fri, Sep 28, 2012 at 09:44:08PM +0200 I heard the voice of > Sami Halabi, and lo! it spake thus: >> >> what count for little, and what count for huge. > > Off the top of my head, I'd say less than 1 gig (maybe 2) or more than > 256. With very little, you may need to start looking at some of the > i386 tuning to things to scale back. But anywhere in the middle the > defaults should work fine (I'm sure there are gains to be had from > working at tuning, but probably not huge and probably very dependent > on your particular hardware and workloads). > > Just as a measuring point, I managed to run ZFS on an moderately busy FTP server with 2GB while waiting for replacement RAM. It worked, but is perhaps not the best approach. Less than 4 or even 8GB ram is probably not recommended these days, especially since RAM is resonably cheap. Regards! -- Niclas P.S. The handbook should perhaps be slightly updated wrt ZFS, at least to clarify that tuning is only needed on i386 in the general case, and that you're usually better off running ZFS on an amd64 machine if you can choose. I'll look into it tomorrow...
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