From owner-freebsd-stable@FreeBSD.ORG Tue Jul 15 20:09:19 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5D95110656D2 for ; Tue, 15 Jul 2008 20:09:19 +0000 (UTC) (envelope-from alex@trull.org) Received: from mail.internationalconspiracy.org (mail.internationalconspiracy.org [85.234.142.62]) by mx1.freebsd.org (Postfix) with ESMTP id E4B0F8FC16 for ; Tue, 15 Jul 2008 20:09:18 +0000 (UTC) (envelope-from alex@trull.org) Received: from localhost (mail.internationalconspiracy.org [85.234.142.62]) by mail.internationalconspiracy.org (Postfix) with ESMTP id 6607D5A4F9; Tue, 15 Jul 2008 21:09:18 +0100 (BST) X-Virus-Scanned: amavisd-new at mail.internationalconspiracy.org Received: from mail.internationalconspiracy.org ([85.234.142.62]) by localhost (mail.internationalconspiracy.org [85.234.142.62]) (amavisd-new, port 10024) with LMTP id RjYIECxI7ssF; Tue, 15 Jul 2008 21:09:14 +0100 (BST) Received: from [192.168.124.200] (77-96-69-222.cable.ubr09.croy.blueyonder.co.uk [77.96.69.222]) by mail.internationalconspiracy.org (Postfix) with ESMTPSA id 878E85A4DB; Tue, 15 Jul 2008 21:09:14 +0100 (BST) From: Alex Trull To: Steve Bertrand In-Reply-To: <200807151955.m6FJtf77008969@apollo.backplane.com> References: <487CCD46.8080506@ibctech.ca> <200807151711.m6FHBgVO007481@apollo.backplane.com> <487CF077.2040201@ibctech.ca> <487CFA08.5000308@ibctech.ca> <200807151955.m6FJtf77008969@apollo.backplane.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-zsy70IF1/yDdnF8PPjW7" Date: Tue, 15 Jul 2008 21:09:12 +0100 Message-Id: <1216152552.6517.56.camel@porksoda> Mime-Version: 1.0 X-Mailer: Evolution 2.22.2 Cc: freebsd-stable@freebsd.org Subject: Re: taskqueue timeout X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Jul 2008 20:09:19 -0000 --=-zsy70IF1/yDdnF8PPjW7 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Don't want to give conflicting advice, and would suggest you certainly try the 30 sec thing first. I'm already on 10 myself but haven't pushed further. In my own case I've not had any issue with zfs in particular since I applied the ZFS zil/prefetch disable loader.conf tunables 10 hours ago. I am observing this now. For the record .. What ata chipset/motherboard and model of disk have you got ? Have you seen any smart errors (real or otherwise) ? What do your 'zpool status' counters look like ? -- Alex On Tue, 2008-07-15 at 12:55 -0700, Matthew Dillon wrote: > :Went from 10->15, and it took quite a bit longer into the backup before=20 > :the problem cropped back up. >=20 > Try 30 or longer. See if you can make the problem go away entirely. > then fall back to 5 and see if the problem resumes at its earlier > pace. >=20 > -- >=20 > It could be temperature related. The drives are being exercised > a lot, they could very well be overheating. To find out add more > airflow (a big house fan would do the trick). >=20 > -- >=20 > It could be that errors are accumulating on the drives, but it seems > unlikely that four drives would exhibit the same problem. >=20 > -- >=20 > Also make sure the power supply can handle four drives. Most power > supplies that come with consumer boxes can't under full load if you > also have a mid or high-end graphics card installed. Power supplies > that come with OEM slap-together enclosures are not usually much bett= er. >=20 > Specifically, look at the +5V and +12V amperage maximums on the power > supply, then check the disk labels to see what they draw, then > multiply by 2. e.g. if your power supply can do 30A@12V and you have > four drives each taking 2A@12V (and typically ~half that at 5V), that= s > 4x2x2 =3D 16A@12V and you would probably be ok. >=20 > To test, remove two of the four drives, reformat the ZFS to use just = 2, > and see if the problem reoccurs with just two drives. >=20 > -Matt >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" --=-zsy70IF1/yDdnF8PPjW7 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBIfQPoey4m6/eWxTQRAotuAJwO3hf5N/ppF8wiCrIGrrQEYxfCAwCfXWmz 9iW+X9EzripUqMg4woL2404= =io+w -----END PGP SIGNATURE----- --=-zsy70IF1/yDdnF8PPjW7--