Date: Tue, 14 Aug 2018 18:36:12 -0700 From: bob prohaska <fbsd@www.zefox.net> To: Warner Losh <imp@bsdimp.com> Cc: Mark Millard <marklmi@yahoo.com>, freebsd-arm <freebsd-arm@freebsd.org>, Mark Johnston <markj@freebsd.org>, bob prohaska <fbsd@www.zefox.net> Subject: Re: RPI3 swap experiments (grace under pressure) Message-ID: <20180815013612.GB51051@www.zefox.net> In-Reply-To: <CANCZdfqFKY3Woa%2B9pVS5hika_JUAUCxAvLznSS4gaLq2kKoWtQ@mail.gmail.com> References: <20180812173248.GA81324@phouka1.phouka.net> <20180812224021.GA46372@www.zefox.net> <B81E53A9-459E-4489-883B-24175B87D049@yahoo.com> <20180813021226.GA46750@www.zefox.net> <0D8B9A29-DD95-4FA3-8F7D-4B85A3BB54D7@yahoo.com> <FC0798A1-C805-4096-9EB1-15E3F854F729@yahoo.com> <20180813185350.GA47132@www.zefox.net> <FA3B8541-73E0-4796-B2AB-D55CE40B9654@yahoo.com> <20180814014226.GA50013@www.zefox.net> <CANCZdfqFKY3Woa%2B9pVS5hika_JUAUCxAvLznSS4gaLq2kKoWtQ@mail.gmail.com>
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On Tue, Aug 14, 2018 at 05:50:11PM -0600, Warner Losh wrote: [big snip] > > So, philosophically, I agree that the system shouldn't suck. Making it > robust against suckage for extreme events that don't match the historic > usage of BSD, though, is going to take some work. > You've taught me a lot in the snippage above, but you skipped a key question: What do modern sysadmins in datacenter environments want their machines to do when overloaded? The overloads could be malign or benign, they might even be profitable. In the old days the rule seemed to be "slow down if you must, but don't stop". Page first, swap second, kill third. Has that changed? Perhaps the jobs aborted by OOMA can be restarted by another machine in the cloud? Then OOMA makes a great deal more sense. Thanks for reading! bob prohaska
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