From owner-freebsd-fs@freebsd.org Sat Aug 1 15:12:06 2015 Return-Path: Delivered-To: freebsd-fs@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 4982A9AF2F1 for ; Sat, 1 Aug 2015 15:12:06 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from douhisi.pair.com (douhisi.pair.com [209.68.5.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 2253E186F for ; Sat, 1 Aug 2015 15:12:05 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from [10.2.2.1] (pool-173-48-121-235.bstnma.fios.verizon.net [173.48.121.235]) by douhisi.pair.com (Postfix) with ESMTPSA id A0C5C3F707 for ; Sat, 1 Aug 2015 11:12:03 -0400 (EDT) Message-ID: <55BCE1C3.50307@sneakertech.com> Date: Sat, 01 Aug 2015 11:12:03 -0400 From: Quartz MIME-Version: 1.0 To: FreeBSD FS Subject: Re: ZFS: Disabling ARC? References: <55BC14B7.9010009@sneakertech.com> <20150801133635.00002ecc@Leidinger.net> In-Reply-To: <20150801133635.00002ecc@Leidinger.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Aug 2015 15:12:06 -0000 > You can tune how the ARC is used: I know *how* to tune it, what I don't know is *when*. Basically, under what sorts of use cases would I want to mess with it, and why? Given my contrived media server example, would adjusting the ARC for those datasets make a noticeable difference either way?