From owner-freebsd-fs@FreeBSD.ORG Wed Jun 10 22:42:34 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 94109106566C for ; Wed, 10 Jun 2009 22:42:34 +0000 (UTC) (envelope-from mat.macy@gmail.com) Received: from mail-yx0-f200.google.com (mail-yx0-f200.google.com [209.85.210.200]) by mx1.freebsd.org (Postfix) with ESMTP id 511A48FC15 for ; Wed, 10 Jun 2009 22:42:34 +0000 (UTC) (envelope-from mat.macy@gmail.com) Received: by yxe38 with SMTP id 38so282182yxe.3 for ; Wed, 10 Jun 2009 15:42:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to:cc :content-type:content-transfer-encoding; bh=owcsug+PuIaYls5JD1uwDrOqr6udSjw6cQJEfkhGJ5Y=; b=oRCjJzxbwzx4flTXcAj9Q1ZbfD6Ud5Kv2M9A9aCVEK0+dSuGsTzKw1S/irQgQ6+7KF +gRZBifED+vB3/OgpEjcYnvk5ZPcnNPNontMZ4ovxoVwanwMdzqbsWtg8kqbjRWNZvli ClfO+9gB/2ifKocf6TH6x4Dpm5m31NfGbyW0Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=OcavAKcccjwsZ1ysCIh9dZo+eNg8rnlI0cYshVrgAFXZ5v6MJWGhdsjwZF2RAuFjNR o8FiAsRZ2SpySHu2I4r6fcNvjiUTn4iXk1E+0zZEYrrVFzSWSCn8U8BnoZlRQbWtZBHa U6Ld5cfPHS8dWBXtkmcF2S1prxffh0M+3BRXM= MIME-Version: 1.0 Sender: mat.macy@gmail.com Received: by 10.100.108.8 with SMTP id g8mr2048988anc.66.1244673753515; Wed, 10 Jun 2009 15:42:33 -0700 (PDT) In-Reply-To: <4A302C1A.4030803@bellanet.org> References: <3c1674c90906101437t5ff9fa72kcad59ff4afe4d1e3@mail.gmail.com> <4A302C1A.4030803@bellanet.org> Date: Wed, 10 Jun 2009 15:42:33 -0700 X-Google-Sender-Auth: 7f61c324c8c4140c Message-ID: <3c1674c90906101542m13c93aedx89c6b03eb188c033@mail.gmail.com> From: Kip Macy To: Graham Todd Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: prefetch change in ZFS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Jun 2009 22:42:34 -0000 This is on HEAD until MFC. -Kip On Wed, Jun 10, 2009 at 2:56 PM, Graham Todd wrote: > Kip Macy wrote: >> Prefetch is still enabled by default on non-i386 systems with more >> than 4GB. To unconditionally enable or disable, set >> "vfs.zfs.prefetch_enable" in loader.conf. > > So is this a change of OID as well (i.e. to "vfs.zfs.prefetch_enable")? > > Here prefetch is enabled by default on a 2GB RAM 7.2-RELEASE system (ZFS > version 6) by setting *vfs.zfs.prefetch_disable* to 0. > > ninga# sysctl vfs.zfs | grep fetch > vfs.zfs.prefetch_disable: 0 > > cheers, > -- When bad men combine, the good must associate; else they will fall one by one, an unpitied sacrifice in a contemptible struggle. Edmund Burke