Date: Thu, 11 Jun 2009 00:23:27 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-stable@freebsd.org Subject: Re: Server lock up: kern.maxswzone relate ... Message-ID: <alpine.BSF.2.00.0906110020220.22030@woozle.rinet.ru> In-Reply-To: <20090610115351.V56412@hub.org> References: <20090610115351.V56412@hub.org>
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On Wed, 10 Jun 2009, Marc G. Fournier wrote: MGF> MGF> I'm running a couple of brand new servers ... 32G of RAM, very little load MGF> on it right now, and this morning it locked up with that 'kern.maxswzone' MGF> error on the console ... MGF> MGF> The server is running a reasonably current 7.2-STABLE: MGF> MGF> FreeBSD pluto.hub.org 7.2-STABLE FreeBSD 7.2-STABLE #0: Sun May 31 14:48:04 MGF> ADT MGF> MGF> And top right now, with everything running, shows no swappping, 19G of Free MGF> memory, 9G of Inact memory ... no reason to do any serious amount of MGF> swapping. MGF> MGF> last pid: 32159; load averages: 0.12, 0.21, 0.47 up 0+10:57:56 MGF> 11:53:39 MGF> 573 processes: 1 running, 571 sleeping, 1 zombie MGF> CPU: 2.0% user, 0.0% nice, 1.2% system, 0.0% interrupt, 96.8% idle MGF> Mem: 1331M Active, 9446M Inact, 659M Wired, 35M Cache, 399M Buf, 19G Free MGF> Swap: 32G Total, 32G Free As a workaround, if your machine is usually not going to swap, you can decrease swap space significally, and use otherwise unused partition for crashdumps. For RELENG_7/amd64 with 8G RAM and 16G of swap, on stress tests with tmpfs to avoid such locks I had to tune kern.maxswzone up to 192M, which seems to be kinda overkill... -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------
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