Date: Thu, 4 Jul 2019 09:49:27 +0200 From: Robert Schulze <rs@bytecamp.net> To: freebsd-questions@freebsd.org Subject: Re: extremely slow disk I/O after updating to 12.0 Message-ID: <3b067eb4-f0c7-4680-c3a9-6dac18f45952@bytecamp.net> In-Reply-To: <b75ce0e3-9e29-f944-fc0c-823c987820ce@malikania.fr> References: <b76b814f-e440-67a9-5424-4e7c5d03d5ca@malikania.fr> <5adc029e-198c-5189-cd6c-4fff1e4980f0@bytecamp.net> <b75ce0e3-9e29-f944-fc0c-823c987820ce@malikania.fr>
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Hi, Am 03.07.19 um 16:33 schrieb David Demelier: > Le 03/07/2019 à 13:43, Robert Schulze a écrit : >> we have seen a drop in I/O performance beginning with 11.2-RELEASE. >> Try disabling scattered ABD: >> >> sysctl vfs.zfs.abd_scatter_enabled=0 > > Thanks for the answer. I'm trying this. > > Is this tunable available at boot (i.e. /boot/loader.conf) or do you put > it in /etc/sysctl.conf? I have set this tuneable in /boot/loader.conf. with kind regards, Robert Schulze
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