Date: Wed, 10 Apr 2013 09:38:36 +0200 From: Joar Jegleim <joar.jegleim@gmail.com> To: Peter Jeremy <peter@rulingia.com> Cc: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: Regarding regular zfs Message-ID: <CAFfb-hpBGQcrSpxWDqNyqjdNSzNa5Qk8mGss-Jz5W2TgAZHgqg@mail.gmail.com> In-Reply-To: <20130408084756.GD31958@server.rulingia.com> References: <CAFfb-hpt4iKSb0S2fgQ16Hp51KLWJew1Se32yX1cUPYi6pp72g@mail.gmail.com> <20130405211249.GB31958@server.rulingia.com> <CAFfb-hqeKqY-8j09BfocDxw5VaBuA=tzS6CZr5Kzor8ZCrBDow@mail.gmail.com> <20130408084756.GD31958@server.rulingia.com>
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no compression or dedup . I've found some hardware to setup a test system where I can debug this thorough, but it's gonna take some time . Appreciate all help, I'll get back to you when I've got a test environment and have done some more tests. -- ---------------------- Joar Jegleim Homepage: http://cosmicb.no Linkedin: http://no.linkedin.com/in/joarjegleim fb: http://www.facebook.com/joar.jegleim AKA: CosmicB @Freenode ---------------------- On 8 April 2013 10:47, Peter Jeremy <peter@rulingia.com> wrote: > On 2013-Apr-08 10:29:52 +0200, Joar Jegleim <joar.jegleim@gmail.com> > wrote: > >I'll check how cache is doing, but as I wrote in my previous reply, the > >'slave' server is completely unresponsive, nothing works at all for 5-15 > >seconds, when the server is responsive again (can ssh in and so on) I > can't > >seem to find anything in dmesg or any log hinting about anything at all > >that went 'wrong' . > > If you have iostat/gstat/top/... running, does it hang (stop updating) > during this period? Is it pingable during the "hang"? > > How about iostat/gstat/top/... running on the console? > > Do you have compression or dedup enabled? > > >I could try DDB, I'm gonna have to get back to you on that, I haven't > >debug'ed FreeBSD kernel before and the system is in production, so I would > >have to be cautious. I might be able to try out that during this week . > > Do you have a test system that you can reproduce the problem on? The > reason I ask about DDB it that it would be useful to get a 'ps' whilst > the system is hung and it sounds like DDB is the only way to get that. > > -- > Peter Jeremy >
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