From owner-freebsd-hackers@freebsd.org Thu Jul 7 10:18:12 2016 Return-Path: Delivered-To: freebsd-hackers@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 B5E1EB753F1 for ; Thu, 7 Jul 2016 10:18:12 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from citapm.icyb.net.ua (citapm.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id 1406C1E7A for ; Thu, 7 Jul 2016 10:18:11 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua [212.40.38.100]) by citapm.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id NAA00458; Thu, 07 Jul 2016 13:18:09 +0300 (EEST) (envelope-from avg@FreeBSD.org) Received: from localhost ([127.0.0.1]) by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD)) id 1bL6Nl-000D2Q-OC; Thu, 07 Jul 2016 13:18:09 +0300 Subject: Re: ZFS ARC and mmap/page cache coherency question To: Paul Koch , Andrew Bates References: <20160630140625.3b4aece3@splash.akips.com> <20160701113243.307739cc@splash.akips.com> Cc: "freebsd-hackers@freebsd.org" From: Andriy Gapon Message-ID: <5ccbe625-1df6-74cb-a3ba-e35182f53a77@FreeBSD.org> Date: Thu, 7 Jul 2016 13:17:12 +0300 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <20160701113243.307739cc@splash.akips.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jul 2016 10:18:12 -0000 On 01/07/2016 04:32, Paul Koch wrote: > akips recordsize 128K default I wonder if setting this to 4K or whatever is a logical block / page size of your application if it's larger than 4K would help. The setting has effect only for new files. -- Andriy Gapon