From owner-freebsd-questions@FreeBSD.ORG Wed Apr 11 14:30:03 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 1BF8316A418 for ; Wed, 11 Apr 2007 14:30:03 +0000 (UTC) (envelope-from derek@computinginnovations.com) Received: from betty.computinginnovations.com (dsl081-227-250.chi1.dsl.speakeasy.net [64.81.227.250]) by mx1.freebsd.org (Postfix) with ESMTP id BF78A13C480 for ; Wed, 11 Apr 2007 14:30:02 +0000 (UTC) (envelope-from derek@computinginnovations.com) Received: from p28.computinginnovations.com (dhcp-10-20-30-100.computinginnovations.com [10.20.30.100]) (authenticated bits=0) by betty.computinginnovations.com (8.13.8/8.12.11) with ESMTP id l3BETHhw002860; Wed, 11 Apr 2007 09:29:17 -0500 (CDT) Message-Id: <6.0.0.22.2.20070411092614.025752d8@mail.computinginnovations.com> X-Sender: derek@mail.computinginnovations.com X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22 Date: Wed, 11 Apr 2007 09:28:45 -0500 To: Gary Kline From: Derek Ragona In-Reply-To: <20070411004319.GC35246@thought.org> References: <20070306003506.GA12553@thought.org> <6.0.0.22.2.20070306072709.02577448@mail.computinginnovations.com> <20070306165349.GA67829@thought.org> <461AEE3F.2010107@napalmriot.com> <20070410231701.GA35246@thought.org> <6.0.0.22.2.20070410183124.024f8b10@mail.computinginnovations.com> <20070411004319.GC35246@thought.org> Mime-Version: 1.0 X-ComputingInnovations-MailScanner-Information: Please contact the ISP for more information X-ComputingInnovations-MailScanner: Found to be clean X-ComputingInnovations-MailScanner-From: derek@computinginnovations.com X-Spam-Status: No Content-Type: text/plain; charset="us-ascii"; format=flowed X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: Rick Olson , Gary Kline , FreeBSD Mailing List Subject: Re: awk question X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Apr 2007 14:30:03 -0000 At 07:43 PM 4/10/2007, Gary Kline wrote: >On Tue, Apr 10, 2007 at 06:35:33PM -0500, Derek Ragona wrote: > > At 06:17 PM 4/10/2007, Gary Kline wrote: > > >On Mon, Apr 09, 2007 at 06:54:07PM -0700, Rick Olson wrote: > > >> I'm assuming you've already taken care of this, but to answer your > > >> original question in AWK form, you could have done the following: > > >> > > >> ls -l | awk '$8 == 2006 {system("rm " $9)}' > > >> > > > > > > i'Ll save your snippet to my growing %%% awk file in my ~/HowTo, > > > thankee much. I'm in the first stages on a months-long trial on > > > system tuning. This, before I'd risk publishing anything. So > > > far tho, by upping and lower the NICE prio of various binaries, I > > > have been able to get more than 70% efficient use out of my older > > > servers. ---This *ought* to carry over to my faster machines.... > > > > > > Is tthere a way of using ps -alx | ask to look at nice and if it > > > is non-zero (the default), to reset it to zero? > > > > You can easily do some of this using top, such as: > > top -bS 200 | tail -n +9 | awk '{ print $5 }' > > > > If you want to tweak the nice value you'd need to examine the value and > > then renice it as long as you are root. You'd need the PID for that, so > > here's another example: > > top -bS 200 | tail -n +9 | awk '{ printf("Pid: %d has Nice: %d\n", > $1,$5) }' > > > > Well, I knew there had to be a "static" way to read top. -bS is > it. If NICE is 9, then renice-n -9 pid ought to reset it to 0; > so in C, the check for nice or "n" would be trivial: > > if (n != 0) > n = -n; > > In you example, would this be if ($1 != 0) $1 = -$1; > then a '{system("renice -n $")}; > or is this disallowed in awk? > > gary It is easier to redirect the output to a file then just execute that file. You'd usually have this in a shell script run by cron. top -bS 200 | tail -n +9 | awk '{ if ($1 != 0) printf("/usr/bin/renice %d %d\n", $1,-$5) }' > /tmp/renice.scr sh -c /tmp/renice.scr But look at the file generated, you need to do more than just the check for 0 and then negate it. -Derek -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks transtec Computers for their support.