Date: Wed, 25 Aug 2010 16:40:24 +0000 From: Marco van Tol <marco@tols.org> To: freebsd-fs@freebsd.org Subject: Re: zfs arc - just take it all and be good to me Message-ID: <20100825164024.GC24997@tolstoy.tols.org> In-Reply-To: <4C752E65.3070701@icyb.net.ua> References: <20100810214418.GA28288@tolstoy.tols.org> <20100811014919.GA52992@icarus.home.lan> <20100811192537.GA44635@tolstoy.tols.org> <AANLkTin-YvEzoN-ThwwDAqn2mWFMD4-7BnP8N95EqTk0@mail.gmail.com> <20100811214302.GB44635@tolstoy.tols.org> <20100812205625.GA79515@server.vk2pj.dyndns.org> <20100824150035.GB99477@roberto-al.eurocontrol.fr> <20100824200527.GC11990@server.vk2pj.dyndns.org> <20100824211136.GA18104@tolstoy.tols.org> <4C752E65.3070701@icyb.net.ua>
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On Wed, Aug 25, 2010 at 05:53:25PM +0300, Andriy Gapon wrote: > on 25/08/2010 00:11 Marco van Tol said the following: > > Would the inactive pages of the long running processes be swapped out in > > favour of the arc? That would be great I think as long as that is made > > clear at an obvious place so people don't get worried about swap usage > > on a system that "shouldn't need to swap out anything". > > > > /usr/src/UPDATING springs to mind, together with quick hints on how to > > see that the swapped out pages are harmless. :) > > I don't think there would be any significant impact on swapping. > Remember that inactive pages also include clean pages that can be > moved to cache > and vnode pages that can be synced to disk. > pagedaemon is smart enough to not trigger swapping too early. > Makes sense? :) It does, thanks a lot. :) Shameless plug: This book is, even tho a bit old, very helpfull: http://www.amazon.com/Design-Implementation-FreeBSD-Operating-System/dp/0201702452 Sidetrack: Are there any plans to have a similar book based on a more recent freebsd version released? -- Marco van Tol
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