Date: Mon, 8 Feb 2010 14:38:21 -0800 From: Artem Belevich <fbsdlist@src.cx> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: ATA_CAM + ZFS gives short 1-2 seconds system freeze on disk load Message-ID: <ed91d4a81002081438s70b8b42cp875ea9822407b309@mail.gmail.com> In-Reply-To: <20100208195620.GA10209@icarus.home.lan> References: <20100208143329.GA12057@megatron.madpilot.net> <20100208145147.GA3733@icarus.home.lan> <20100208171822.12773278@r500.local> <20100208165853.GA43617@megatron.madpilot.net> <20100208195620.GA10209@icarus.home.lan>
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> I'd like a technical explanation of exactly what this loader.conf > tunable does. =A0The sysctl -d explanation is useful if one has insight t= o > what purpose it serves. =A0I can find mention on Solaris lists about "txg > timeout", but the context is over my head (intended for those very > familiar with the inner workings of ZFS). Ben Rockwood's blog has pretty decent explanation of how transaction groups in ZFS work: http://www.cuddletech.com/blog/pivot/entry.php?id=3D1015 --Artem
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