From owner-freebsd-questions@freebsd.org Thu Feb 8 19:59:45 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6F64AF2076D for ; Thu, 8 Feb 2018 19:59:45 +0000 (UTC) (envelope-from 4250.10.freebsd-questions=freebsd.org@email-od.com) Received: from bca5.email-od.com (bca5.email-od.com [207.246.239.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E6DB379E10 for ; Thu, 8 Feb 2018 19:59:44 +0000 (UTC) (envelope-from 4250.10.freebsd-questions=freebsd.org@email-od.com) DKIM-Signature: v=1; a=rsa-sha256; d=email-od.com;i=@email-od.com;s=dkim; c=relaxed/relaxed; q=dns/txt; t=1518119987; x=1520711987; h=content-transfer-encoding:content-type:mime-version:references:in-reply-to:message-id:subject:to:from:date:x-thread-info; bh=CVnNYltT5+BSEdwDp8nig27YM0s1sgL5l1qlhiGr/tg=; b=jpy3dsnmqhVX7Gd9eOY/vWrKGPJC26BhHx9UDGt0nlquT/MryeKHq+9Vl2XIX3JAp+ei2f2Kv/Sw3G0E7YOD8aqiarKg9hU0NEfF23zmzzr6bj5artAJUh+/M1boX6x0YsfrDO/DR8+ZJv4cyv1KqNrbXjBqlR5QFNyteesyLco= X-Thread-Info: NDI1MC4xMi44ZTAwMDAwMDI2YTZhYS5mcmVlYnNkLXF1ZXN0aW9ucz1mcmVlYnNkLm9yZw== Received: from r2.us-west-2a.aws.in.socketlabs.com (r2.us-west-2a.aws.in.socketlabs.com [54.186.58.227]) by bca2.email-od.com with ESMTP(version=Tls12 cipher=Aes256 bits=256); Thu, 8 Feb 2018 14:59:41 -0500 Received: from smtp.lan.sohara.org (EMTPY [89.127.62.20]) by r2.us-west-2a.aws.in.socketlabs.com with ESMTP(version=Tls12 cipher=Aes256 bits=256); Thu, 8 Feb 2018 14:59:39 -0500 Received: from [192.168.63.1] (helo=steve.lan.sohara.org) by smtp.lan.sohara.org with smtp (Exim 4.90 (FreeBSD)) (envelope-from ) id 1ejsM4-000PAG-Fp for freebsd-questions@freebsd.org; Thu, 08 Feb 2018 19:59:36 +0000 Date: Thu, 8 Feb 2018 19:59:36 +0000 From: Steve O'Hara-Smith To: freebsd-questions@freebsd.org Subject: Re: Swap on SSD Message-Id: <20180208195936.a846d1d371046b84658bd711@sohara.org> In-Reply-To: <17345a3e119a97154cf3e8bb40beb84f@roundcube.fjl.org.uk> References: <396EC97D-AF5C-4D37-9172-7212B3B0BDDB@kreme.com> <20180208075746.917d9319074bd831af69eacd@sohara.org> <17345a3e119a97154cf3e8bb40beb84f@roundcube.fjl.org.uk> X-Mailer: Sylpheed 3.6.0 (GTK+ 2.24.31; amd64-portbld-freebsd11.0) X-Clacks-Overhead: "GNU Terry Pratchett" Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Feb 2018 19:59:45 -0000 On Thu, 08 Feb 2018 17:58:59 +0000 Frank Leonhardt wrote: > So why not use a page file instead? Or better still multiple page files > spread across all available physical disks? You don't want the overhead of going through a file system to get to the swap pages, but having swap interleaved over all physical discs is a good thing to do if you actually allow the swap to be used significantly. -- Steve O'Hara-Smith