From owner-freebsd-questions@freebsd.org Sun Jan 24 10:32:29 2016 Return-Path: Delivered-To: freebsd-questions@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 0EDEE73A8 for ; Sun, 24 Jan 2016 10:32:29 +0000 (UTC) (envelope-from cyberleo@cyberleo.net) Received: from mail.cyberleo.net (paka.cyberleo.net [216.226.128.180]) by mx1.freebsd.org (Postfix) with ESMTP id E980E752 for ; Sun, 24 Jan 2016 10:32:28 +0000 (UTC) (envelope-from cyberleo@cyberleo.net) Received: from [172.16.44.4] (vitani.den.cyberleo.net [216.80.73.130]) by mail.cyberleo.net (Postfix) with ESMTPSA id E2C4C1F3CE; Sun, 24 Jan 2016 05:24:23 -0500 (EST) Subject: Re: ZFS performance help sought To: Mason Loring Bliss , freebsd-questions@freebsd.org References: <20160121205139.GG4538@blisses.org> From: CyberLeo Kitsana Message-ID: <56A4A657.3080506@cyberleo.net> Date: Sun, 24 Jan 2016 04:24:23 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <20160121205139.GG4538@blisses.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 24 Jan 2016 10:32:29 -0000 On 01/21/16 14:51, Mason Loring Bliss wrote: > Hi all. > Running FreeBSD, a zfs send/receive from one pool to another makes my system > almost unusably slow and even begins to dig me into swap a little. As a test > a little while back, I capped the ARC at half RAM, but that didn't matter a > bit. I started looking into scheduler tweaking when I decided to take the > path of least resistance and just install Linux instead. ZFS on Linux on > literally the same hardware, dealing with the same pools, handles this same > disk I/O without a hiccough. Do you use gzip compression in your pool? -- Fuzzy love, -CyberLeo Technical Administrator CyberLeo.Net Webhosting http://www.CyberLeo.Net Furry Peace! - http://www.fur.com/peace/