From owner-freebsd-stable@FreeBSD.ORG Tue May 29 19:33:39 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx2.freebsd.org (mx2.freebsd.org [69.147.83.53]) by hub.freebsd.org (Postfix) with ESMTP id 17D701065677 for ; Tue, 29 May 2012 19:33:39 +0000 (UTC) (envelope-from dougb@FreeBSD.org) Received: from [127.0.0.1] (hub.freebsd.org [IPv6:2001:4f8:fff6::36]) by mx2.freebsd.org (Postfix) with ESMTP id 8FFD71A5CC5; Tue, 29 May 2012 19:32:30 +0000 (UTC) Message-ID: <4FC5244C.5090502@FreeBSD.org> Date: Tue, 29 May 2012 12:32:28 -0700 From: Doug Barton Organization: http://www.FreeBSD.org/ User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Kees Jan Koster References: In-Reply-To: X-Enigmail-Version: 1.4.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: FreeBSD 9.0 hangs on heavy I/O 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, 29 May 2012 19:33:39 -0000 On 5/29/2012 12:26 PM, Kees Jan Koster wrote: > I seem to have a problem where really heavy disk I/O is drowning my machine. Assuming you're using the default scheduler (SCHED_ULE), try switching to the 4BSD scheduler in your kernel config file and see if that helps. Doug -- This .signature sanitized for your protection