From owner-freebsd-stable@FreeBSD.ORG Tue May 29 21:30:50 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D2676106564A for ; Tue, 29 May 2012 21:30:50 +0000 (UTC) (envelope-from kjkoster@gmail.com) Received: from mail-wg0-f50.google.com (mail-wg0-f50.google.com [74.125.82.50]) by mx1.freebsd.org (Postfix) with ESMTP id 559848FC1D for ; Tue, 29 May 2012 21:30:49 +0000 (UTC) Received: by wgbds11 with SMTP id ds11so4356119wgb.31 for ; Tue, 29 May 2012 14:30:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; bh=gQ0X5tIea8kHHpr8ILl2JBAfYmVLTO7Dajs2mZJNNYQ=; b=RqSmV1wChi8OZZG+PvklTfIyPA/oE1oaqNbPZ2846N+1l8DwAKysnW70GeJWoZk//Y +vMDD8QNkMC2/o4rj4waH3by1J6lM43UdsoaMJF7wgShuktRVa8cDKFm9/3NFne8Tcgl 0RvfWksvsuNNsTJtGKM2baBaFxsN1ylh4kJVUHYRjlcNJ5F3pMK094tkVLeL2NOmjHOC 0yKsvcB+ghd2OLlrKttLmn+sOZLOnNWy/sh+tIbenDElHG300uWDS+xPzzfzGXhRJJc3 0tqMwr3q07Bcyw/aAYWbnHYtDnfThTEobS2Zx92dpwt6ReRpOvLYRVWW7odwH0IGmamn gIOw== Received: by 10.216.145.219 with SMTP id p69mr2554820wej.37.1338327049073; Tue, 29 May 2012 14:30:49 -0700 (PDT) Received: from kees-jan-kosters-macbook-air.fritz.box (kjkoster.org. [83.163.197.206]) by mx.google.com with ESMTPS id d10sm48856439wiy.3.2012.05.29.14.30.47 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 29 May 2012 14:30:48 -0700 (PDT) Mime-Version: 1.0 (Apple Message framework v1278) Content-Type: text/plain; charset=us-ascii From: Kees Jan Koster In-Reply-To: Date: Tue, 29 May 2012 23:30:46 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <66F196D1-A6D0-437B-886B-2E1A445A69F2@gmail.com> References: <17320979-2ED2-4DF2-97E9-09035F4DD3BB@gmail.com> To: Freddie Cash X-Mailer: Apple Mail (2.1278) 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 21:30:50 -0000 Dear Freddie, > Granted, I haven't played with gsched yet (most of our high-I/O > systems are ZFS), so there may be a way to use it across-GEOMs. =46rom my previous experiments ZFS suffers the same fate when there is = heavy write activity. Reads just don't get served in time. How do you deal with that? -- Kees Jan http://java-monitor.com/ kjkoster@kjkoster.org +31651838192 Change is good. Granted, it is good in retrospect, but change is good.