Received: from localhost (maia-5.hub.org [200.46.204.182]) by postgresql.org (Postfix) with ESMTP id D7A5A9FB7A8 for ; Sat, 26 May 2007 01:02:00 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.182]) (amavisd-maia, port 10024) with ESMTP id 91916-06 for ; Sat, 26 May 2007 01:01:57 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from westnet.com (westnet.com [216.187.52.2]) by postgresql.org (Postfix) with ESMTP id 881089FB78F for ; Sat, 26 May 2007 01:01:57 -0300 (ADT) Received: from westnet.com (localhost [127.0.0.1]) by westnet.com (8.14.0/8.14.0) with ESMTP id l4Q41uex022057 for ; Sat, 26 May 2007 00:01:56 -0400 (EDT) Received: from localhost (gsmith@localhost) by westnet.com (8.14.0/8.13.2/Submit) with ESMTP id l4Q41uwM022054 for ; Sat, 26 May 2007 00:01:56 -0400 (EDT) X-Authentication-Warning: westnet.com: gsmith owned process doing -bs Date: Sat, 26 May 2007 00:01:56 -0400 (EDT) From: Greg Smith X-X-Sender: gsmith@westnet.com To: pgsql-performance@postgresql.org Subject: Re: ECC RAM really needed? In-Reply-To: <20070526021553.GA8875@wolff.to> Message-ID: References: <4657912B.3000508@emolecules.com> <20070526021553.GA8875@wolff.to> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200705/551 X-Sequence-Number: 24941 On Fri, 25 May 2007, Bruno Wolff III wrote: > Wikipedia suggests a rule of thumb of one error per month per gigabyte, > though suggests error rates vary widely. They reference a paper that > should provide you with more background. The paper I would recommend is http://www.tezzaron.com/about/papers/soft_errors_1_1_secure.pdf which is a summary of many other people's papers, and quite informative. I know I had no idea before reading it how much error rates go up with increasing altitute. -- * Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD