Date: Mon, 10 Feb 2014 17:17:52 +0000 From: John <freebsd-lists@potato.growveg.org> To: "freebsd-emulation@freebsd.org" <freebsd-emulation@freebsd.org> Subject: Re: virtualbox tips for performance specific to FreeBSD-10 hosts Message-ID: <20140210171752.GC95748@potato.growveg.org> In-Reply-To: <CAE-m3X3vuYDqkvMQOAWbZmieoJ-oJH2Sgih-8c-SBSWR7Qcyvw@mail.gmail.com> References: <20140208095107.GA1232@potato.growveg.org> <CAE-m3X3vuYDqkvMQOAWbZmieoJ-oJH2Sgih-8c-SBSWR7Qcyvw@mail.gmail.com>
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Hi, thanks for replying. On Mon, Feb 10, 2014 at 09:39:34AM +0100, Bernhard Fr?hlich wrote: > I would not recommend using VirtualBox on such a box. VirtualBox is a Desktop > Virtualisation product and that specs are too high to make good use of them. > > One issue you will run into is ZFS ARC - with that amount of memory it will take > quite some time to fill up but ZFS ARC and VirtualBox wired memory will start > fighting each other. So I recommend limiting ZFS ARC to some sane amount. > (32GB?) > > VirtualBox has quite a bit more overhead than all the other server > grade virtualisation > products out there and that is especially true for I/O. With FreeBSD > 10 you should > already use AHCI on the host and the linux guests will likely use an > SATA controller > and AHCI too. That should be the minimum and is also what we have already > written down in the vbox tuning notes: > > https://wiki.freebsd.org/VirtualBox/Tuning I had looked at that. I was looking for some tunable on the linux VMs as well. Like I said, performance so far has been OK but I see what you mean by VB being really aimed at desktops. That's the impression I got, too. The running out of ARC is a worry because some of these VMs will be doing (eventually) heavy SQL work. The VMs I have on there at the moment aren't taxing the hardware at all, yet. Probably due to there being only two running on there presently. I think I'll have to familiarise myself with bhyve. Steep learning curve! thanks, -- John
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