From owner-freebsd-questions@FreeBSD.ORG Thu May 30 19:18:54 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 1B05F5DD for ; Thu, 30 May 2013 19:18:54 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from plane.gmane.org (plane.gmane.org [80.91.229.3]) by mx1.freebsd.org (Postfix) with ESMTP id D28F3F07 for ; Thu, 30 May 2013 19:18:53 +0000 (UTC) Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Ui8N3-0008T4-DO for freebsd-questions@freebsd.org; Thu, 30 May 2013 21:18:51 +0200 Received: from 79-139-19-75.prenet.pl ([79.139.19.75]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 30 May 2013 21:18:45 +0200 Received: from jb.1234abcd by 79-139-19-75.prenet.pl with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 30 May 2013 21:18:45 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: jb Subject: Re: "swap" partition leads to instability? Date: Thu, 30 May 2013 19:18:29 +0000 (UTC) Lines: 23 Message-ID: References: <1369558712.96152.YahooMailNeo@web165006.mail.bf1.yahoo.com> <20130529133516.295084a6@gumby.homeunix.com> <20130530160555.3104ced6@gumby.homeunix.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: sea.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 79.139.19.75 (Mozilla/5.0 (X11; Linux i686; rv:21.0) Gecko/20100101 Firefox/21.0) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 May 2013 19:18:54 -0000 RW googlemail.com> writes: > ... > > Yes, there is some confusion about the diff, if any, between paging > > and swapping. > > > > Paging - copying or moving pages between physical memory (RAM) and > > secondary storage (e.g. hard disk), in both directions. > > Swapping - nowdays is synonymous with "paging". > > But its history is as follows (per Wikipedia): > > This is a bit Linux-centric. > ... > You page-out pages and swap-out processes. > > When FreeBSD is very short of memory it swaps-out entire processes to > concentrate the memory in the running processes. Linux goes directly > from paging to killing processes. That was helpful - knowing the details of VMM implementation in various OSs helps understand the generalizations, with exceptions ... jb