From owner-freebsd-fs@freebsd.org Wed Jun 21 07:58:46 2017 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 E916BD890C4 for ; Wed, 21 Jun 2017 07:58:46 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: from mail-wr0-x232.google.com (mail-wr0-x232.google.com [IPv6:2a00:1450:400c:c0c::232]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9F01584495 for ; Wed, 21 Jun 2017 07:58:46 +0000 (UTC) (envelope-from killing@multiplay.co.uk) Received: by mail-wr0-x232.google.com with SMTP id 77so123399415wrb.1 for ; Wed, 21 Jun 2017 00:58:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=multiplay-co-uk.20150623.gappssmtp.com; s=20150623; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language; bh=FYEb1py5PyE2GmULcmiqio4Oj5i79I7DeaHwQfg6wQA=; b=vJftco/IXaPsv/s5s4RMuQt3iUhugQBeuJKGtpcEf4MoCXeyqmowxbw37o2Bb/MloY agKzQrGHRA59CVOeyPElo5bV196auRZCERc5bg56z9h38vadNbpQEQhGagSfdha69KTW X+IekGGf8q+Py+ryLkQ5KjyKkWndc4h1e/Jg9Rk6rO7p3HljeE8UUL7mqEt2zYsZ7PVn JDNJXDVfgWsYaiNYGXV4TacHY+7IwMkwdvtGyaxSz1gEF86KURw+rpxYZZFPqN14H4gx Uts3CTwgGzRcYMgW8DqtPhPnkjPWQNkV8YWPAzEmJgNsjjZp/CuNGZ9uOJQ1c3mwzgXC JQtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language; bh=FYEb1py5PyE2GmULcmiqio4Oj5i79I7DeaHwQfg6wQA=; b=l6rJPXTb/C1uj7wdC5MLqArWpJRX6sgGX8G4xgEx10Sy/R2dQCjLZjQVqDK8s0kTiq JFNk6+dRUE0IpmC3RhWoIr2qA1yjfD5YeYpcBDx2zht28XaDN80kUeoRe2j2kVOvbeqr Xc0gNNBG22CKQkf+Sjg4ns87YSzqp44o1w8BagwLUSvZikvDxwTr+8rkRFlcb3kQGHLW 3NVZsDIMSFrNSBNcPbTaENZQ52gKHMx3aq7rDkDWRIrNKsd4ZHnLuhJNgCGIHMC7Se/7 wDxOvRXiU1I+9CRy/FT+PhZPgop1ww2jWQLm7mQC9mShsbSN9XWclaNkwmhcutVAQDkc V7pA== X-Gm-Message-State: AKS2vOz4xb5scbasi2npNXROLu5ZgNM9lnDmOiUvBswoA0IDlW3+V5o0 Y7Mr5CesSvaeKX2BzgZuCw== X-Received: by 10.28.153.75 with SMTP id b72mr5615604wme.46.1498031924345; Wed, 21 Jun 2017 00:58:44 -0700 (PDT) Received: from [10.10.1.111] ([185.97.61.15]) by smtp.gmail.com with ESMTPSA id k45sm1966636wrk.45.2017.06.21.00.58.43 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 21 Jun 2017 00:58:43 -0700 (PDT) Subject: Re: FreeBSD 11.1 Beta 2 ZFS performance degradation on SSDs To: freebsd-fs@freebsd.org References: <47a7d5714e3c4db4aacb6a65d82d8077@DM2PR58MB013.032d.mgd.msft.net> From: Steven Hartland Message-ID: Date: Wed, 21 Jun 2017 08:58:42 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 MIME-Version: 1.0 In-Reply-To: <47a7d5714e3c4db4aacb6a65d82d8077@DM2PR58MB013.032d.mgd.msft.net> Content-Language: en-US Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jun 2017 07:58:47 -0000 While that may be the fix the behavior is interesting none the less, see my other reply about IOPs sizing. On 20/06/2017 23:02, Caza, Aaron wrote: > With regards to this issue, it's a case of the old FreeBSD 9.0 settings not working the same as in FreeBSD 10 & 11: the ZFS ARC min & max settings I was utilizing were too aggressive. > > On a separate server with 18 days of uptime, bumping vfs.zfs.arc_min and vfs.zfs.arc_max up to something more reasonable sans reboot restored performance. > > Apologies for the noise and thanks for the suggestions. >