Date: Tue, 1 Mar 2016 20:50:37 -0600 (CST) From: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> To: Miroslav Lachman <000.fbsd@quip.cz> Cc: Steven Hartland <killing@multiplay.co.uk>, freebsd-fs@freebsd.org Subject: Re: abnormally high CPU load after zfs destroy Message-ID: <alpine.GSO.2.01.1603012050080.20809@freddy.simplesystems.org> In-Reply-To: <56D5CEC1.2070000@quip.cz> References: <56D4964D.3010604@quip.cz> <56D4B66D.4070007@multiplay.co.uk> <56D5CEC1.2070000@quip.cz>
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On Tue, 1 Mar 2016, Miroslav Lachman wrote: > Steven Hartland wrote on 02/29/2016 22:21: >> Its likely churning through the actual delete, show system processes in >> top and you'll see it. > > Yes, there are about 300 kernel thread doing ZFS work, but should it really > bomb the system that way? The system is heavilly lagging for about 10 > minutes. Are there any sysctl to control this behavior? Is it possible that you enabled the dedup feature? Bob -- Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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