Date: Tue, 26 Jun 2018 14:39:27 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: Alexander Leidinger <Alexander@leidinger.net>, "current@freebsd.org" <current@freebsd.org> Subject: Re: numa involved in instability and swap usage despite RAM free? Message-ID: <CAJ-VmokW6bfTov8tvKQcpcVaKj=dxvPjmuTsejPVEh0mpKGrPg@mail.gmail.com> In-Reply-To: <20180625182250.GA40651@troutmask.apl.washington.edu> References: <20180624120329.Horde.HWORumQ7Ng1KAUeviJNtoc3@webmail.leidinger.net> <20180625182250.GA40651@troutmask.apl.washington.edu>
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Hi, Aren't there now per-domain VM counters you can query via sysctl? Maybe they'd help in diagnosing what's going on. -adrian On Mon, 25 Jun 2018 at 11:23, Steve Kargl <sgk@troutmask.apl.washington.edu> wrote: > > On Sun, Jun 24, 2018 at 12:03:29PM +0200, Alexander Leidinger wrote: > > > > I don't have hard evidence, but there is enough "smell" to open up a > > discussion... > > > > Short: > > Can it be that enabling numa in the kernel is the reason why some > > people see instability with zfs and usage of swap while a lot of free > > RAM is available? > > Interesting observation. I do have NUMA in my kernel, and swap > seems to be used instead of recycling freeing inactive memory. > Top shows > > Mem: 506M Active, 27G Inact, 98M Laundry, 2735M Wired, 1474M Buf, 1536M Free > Swap: 16G Total, 120M Used, 16G Free > > Perhaps, I don't understand what is meant by inactive memory. I > thought that this means memory is still available in the buffer > cache, but nothing is current using what is there. > > -- > Steve > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
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