From owner-freebsd-fs@FreeBSD.ORG Mon Apr 8 08:48:10 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 7077A1D8 for ; Mon, 8 Apr 2013 08:48:10 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vps.rulingia.com (host-122-100-2-194.octopus.com.au [122.100.2.194]) by mx1.freebsd.org (Postfix) with ESMTP id E5F91B2E for ; Mon, 8 Apr 2013 08:48:09 +0000 (UTC) Received: from server.rulingia.com (c220-239-237-213.belrs5.nsw.optusnet.com.au [220.239.237.213]) by vps.rulingia.com (8.14.5/8.14.5) with ESMTP id r388m1Jw056396 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 8 Apr 2013 18:48:01 +1000 (EST) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.14.5/8.14.5) with ESMTP id r388luVL003160 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 8 Apr 2013 18:47:56 +1000 (EST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.14.5/8.14.5/Submit) id r388lupn003159; Mon, 8 Apr 2013 18:47:56 +1000 (EST) (envelope-from peter) Date: Mon, 8 Apr 2013 18:47:56 +1000 From: Peter Jeremy To: Joar Jegleim Subject: Re: Regarding regular zfs Message-ID: <20130408084756.GD31958@server.rulingia.com> References: <20130405211249.GB31958@server.rulingia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="R3G7APHDIzY6R/pk" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.5.21 (2010-09-15) Cc: "freebsd-fs@freebsd.org" X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Apr 2013 08:48:10 -0000 --R3G7APHDIzY6R/pk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2013-Apr-08 10:29:52 +0200, Joar Jegleim 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? =20 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. --=20 Peter Jeremy --R3G7APHDIzY6R/pk Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlFihDwACgkQ/opHv/APuIdTzACaA2goH3sEQrsMAQq4tEZN5z0T 2tsAoIQVrf9eStN1x0j1FY5pk1rjIYsw =bS8z -----END PGP SIGNATURE----- --R3G7APHDIzY6R/pk--