From owner-freebsd-hackers@freebsd.org Thu Dec 24 04:16:17 2015 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 0787CA50614 for ; Thu, 24 Dec 2015 04:16:17 +0000 (UTC) (envelope-from joe@via.net) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id E72A31B19 for ; Thu, 24 Dec 2015 04:16:16 +0000 (UTC) (envelope-from joe@via.net) Received: by mailman.ysv.freebsd.org (Postfix) id E5241A50611; Thu, 24 Dec 2015 04:16:16 +0000 (UTC) Delivered-To: hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E3DD0A5060F for ; Thu, 24 Dec 2015 04:16:16 +0000 (UTC) (envelope-from joe@via.net) Received: from smtp2.via.net (smtp2.via.net [209.81.9.14]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CECE31B18 for ; Thu, 24 Dec 2015 04:16:16 +0000 (UTC) (envelope-from joe@via.net) Received: from mail.via.net (mail.via.net [209.81.9.12]) by smtp2.via.net (8.14.1/8.14.1-VIANET) with ESMTP id tBO4B3hb028871 for ; Wed, 23 Dec 2015 20:11:03 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.97.3 at smtp2.via.net Received: from 91-2.via.net (91-2.via.net [209.81.2.91] (may be forged)) (authenticated bits=0) by mail.via.net (8.14.1/8.14.1-VIANET) with ESMTP id tBO4B2BO009575 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 23 Dec 2015 20:11:02 -0800 (PST) From: joe mcguckin Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: ZFS questions, ZFS hang Message-Id: Date: Wed, 23 Dec 2015 20:09:36 -0800 To: hackers@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 9.2 \(3112\)) X-Mailer: Apple Mail (2.3112) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (smtp2.via.net [209.81.9.14]); Wed, 23 Dec 2015 20:11:03 -0800 (PST) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Dec 2015 04:16:17 -0000 I have a dual xeon w 16G of ram and 16 drives that I=E2=80=99m using to = play around with zfs. I was running the 32 bit kernel and everything seemed to work ok. I = upgraded to the amd 64 bit kernel and I=E2=80=99m seeing the box hang under load. No error messages = - it just goes catatonic. I=E2=80=99m running the GENERIC kernel. Are there any recommended kernel = settings I should be using? Thanks, Joe