Date: Sun, 6 Jan 2008 15:51:05 +0100 From: "Ivan Voras" <ivoras@freebsd.org> To: "Kris Kennaway" <kris@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: When will ZFS become stable? Message-ID: <9bbcef730801060651y489f1f9bw269d0968407dd8fb@mail.gmail.com> In-Reply-To: <4780E546.9050303@FreeBSD.org> References: <fll63b$j1c$1@ger.gmane.org> <20080104163352.GA42835@lor.one-eyed-alien.net> <9bbcef730801040958t36e48c9fjd0fbfabd49b08b97@mail.gmail.com> <200801061051.26817.peter.schuller@infidyne.com> <9bbcef730801060458k4bc9f2d6uc3f097d70e087b68@mail.gmail.com> <4780D289.7020509@FreeBSD.org> <flqmbo$eac$1@ger.gmane.org> <4780E546.9050303@FreeBSD.org>
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On 06/01/2008, Kris Kennaway <kris@freebsd.org> wrote: > That's an assertion directly contradicted by my experience running a > heavily loaded 8-core i386 package builder. What is the IO profile of this usage? I'd guess that it's "short bursts of high activity (archive extraction, installing) followed by long periods of low activity (compiling)". From what I see on the lists and somewhat from my own experience, the problem appears more often when the load is more like "constant high r+w activity", probably with several users (applications) doing the activity in parallel. > Please explain in detail > the steps you have taken to tune your kernel. vm.kmem_size="512M" vm.kmem_size_max="512M" This should be enough for a 2 GB machine that does other things. > Do you have the vm_kern.c > patch applied? I can confirm that while it delays the panics, it doesn't eliminate them (this also seems to be the conclusion of several users that have tested it shortly after it's been posted). The fact that it's not committed is good enough indication that it's not The Answer. (And besides, asking users to apply non-committed patches just to run their systems normally is bad practice :) I can just imagine the Release Notes: "if you're using ZFS, you'll have to manually patch the kernel with this patch:..." :) This close to the -RELEASE, I judge the chances of it being committed are low).
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