Date: Mon, 10 Dec 2007 09:06:50 -0800 From: "Michael Haro" <mharo@freebsd.org> To: "Alexandre Biancalana" <biancalana@gmail.com> Cc: freebsd-current@freebsd.org, Benjamin Close <Benjamin.Close@clearchain.com> Subject: Re: 7-BETA3 everyday reboot Message-ID: <dbc12cb30712100906y701c6c32p7d79f2db8f78f0a4@mail.gmail.com> In-Reply-To: <8e10486b0712100523k45c61865v7821d0522ad5f994@mail.gmail.com> References: <8e10486b0711280537n222d6cd5le33639b82a11f45@mail.gmail.com> <9bbcef730711290634k347bc0c6re0da8676bab37873@mail.gmail.com> <8e10486b0711290637u711c67b3i17925777e4481346@mail.gmail.com> <8e10486b0711300247q4438235ata70ca42030871286@mail.gmail.com> <20071130124801.74c40ef9@peedub.jennejohn.org> <8e10486b0712040521u5c7015b8h86d0da5554162898@mail.gmail.com> <47556554.3010505@clearchain.com> <8e10486b0712040719ydcf32e0mbe690c3f18968691@mail.gmail.com> <dbc12cb30712070036k3a83f7c7nf429ae818f72e073@mail.gmail.com> <8e10486b0712100523k45c61865v7821d0522ad5f994@mail.gmail.com>
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On 12/10/07, Alexandre Biancalana <biancalana@gmail.com> wrote: > > On 12/7/07, Michael Haro <mharo@freebsd.org> wrote: > > > > > > > > I have found that turning off zil and prefetch seem to keep things > > > > happier on one of the heavily loaded servers that I look after. > > > > It also appears to prevent a deadlock under very heavy load - > something > > > > I've not yet had time to debug. > > > > Try adding: > > > > > > > > vfs.zfs.zil_disable=1 > > > > vfs.zfs.prefetch_disable="1" > > > > > > > > to /boot/loader.conf > > > > > > > > and let us know if it makes a difference. > > > > > > Added now only > > > > > > vfs.zfs.prefetch_disable="1" > > > > > > > > > I let you know the result. > > > > Is the result promising? > > > > > Yes ! The machine does not reboot anymore ! What combination of settings did you have to do to make it stable? I tried setting vfs.zfs.prefetch_disable="1' in loader.conf and my machine still panics within 20 minutes during (I think) large file transfers.
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