Date: Tue, 02 Jun 2009 19:12:26 -0400 From: Steve Bertrand <steve@ibctech.ca> To: Glen Barber <glen.j.barber@gmail.com> Cc: "freebsd-questions@freebsd.org Questions -" <freebsd-questions@freebsd.org> Subject: Re: Set task priority Message-ID: <4A25B1DA.10201@ibctech.ca> In-Reply-To: <4ad871310906021609y4b85025bwe16346b824df7bf3@mail.gmail.com> References: <4A25B029.1030608@ibctech.ca> <4ad871310906021609y4b85025bwe16346b824df7bf3@mail.gmail.com>
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This is a cryptographically signed message in MIME format. --------------ms090401060005090904030007 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Glen Barber wrote: > Hi Steve > > On Tue, Jun 2, 2009 at 7:05 PM, Steve Bertrand <steve@ibctech.ca> wrote: >> Hi everyone, >> >> I'm attempting to "mysqldump" a database on a box that is hovering near >> max CPU and mem usage. >> >> When I run the command, other critical programs fail to respond causing >> an 'outage-like' situation. >> >> Normally, this is a time-of-day task and will run happily later into the >> night, but I want to run it now. >> >> What is the best way to set priority on my task in order to ensure it >> completes as quickly as possible, but does not cause a situation where >> other programs and their children can't respond? >> > > You can use nice(1) or renice(1) to set priorities, but I/O and > bandwidth will end up being your bottleneck. Thanks Glen, I'll have to play around a bit. Looking closer, it does appear to be a disk I/O issue, but I figured that if I tried to prioritize the job, it might ease-up on all system aspects. 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