From owner-freebsd-questions@FreeBSD.ORG Wed Jan 8 14:01:08 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 12F01D04 for ; Wed, 8 Jan 2014 14:01:08 +0000 (UTC) Received: from uk1rly2283.eechost.net (uk1rly2283.eechost.net [217.69.40.75]) by mx1.freebsd.org (Postfix) with ESMTP id C7C531CEB for ; Wed, 8 Jan 2014 14:01:07 +0000 (UTC) Received: from [31.186.37.179] (helo=smtp.marelmo.com) by uk1rly2283.eechost.net with esmtpa (Exim 4.72) (envelope-from ) id 1W0tgn-0006q3-WE; Wed, 08 Jan 2014 14:00:58 +0000 Received: from [192.168.63.1] (helo=steve.marelmo.com) by smtp.marelmo.com with smtp (Exim 4.80.1 (FreeBSD)) (envelope-from ) id 1W0tgu-0000ns-2d; Wed, 08 Jan 2014 14:01:04 +0000 Date: Wed, 8 Jan 2014 14:01:03 +0000 From: Steve O'Hara-Smith To: freebsd-questions@freebsd.org Subject: Re: Server hang Message-Id: <20140108140103.965e698616052d7587c31418@sohara.org> In-Reply-To: <20140108143812.bcfc9a75.freebsd@edvax.de> References: <20140106182826.28018a2f@X220.alogt.com> <20140107085545.06310df9.freebsd@edvax.de> <20140107115216.1f06587d.freebsd@edvax.de> <20140107211012.GA47988@neutralgood.org> <20140108143812.bcfc9a75.freebsd@edvax.de> X-Mailer: Sylpheed 3.3.0 (GTK+ 2.24.19; amd64-portbld-freebsd9.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Auth-Info: 15567@permanet.ie (plain) Cc: Polytropon X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Jan 2014 14:01:08 -0000 On Wed, 8 Jan 2014 14:38:12 +0100 Polytropon wrote: > On Tue, 7 Jan 2014 16:10:12 -0500, kpneal@pobox.com wrote: > > So a memory tester > > cannot tell if a stick of memory is _good_; it can only tell that it is > > _bad_. > > That is a very good summary. > > To add some science-y statement: It will tell you that memory > is bad in _finite_ time, but requires infinite time to make > sure it's actually good by running (without end). :-) Any memory will go bad given infinite time Even really good ECC memory has an error rate, no memory is perfect -- Steve O'Hara-Smith