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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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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.

Cheers,

Steve

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