Path: news.cambrium.nl!textnews.cambrium.nl!feeder3.cambriumusenet.nl!feed.tweaknews.nl!193.201.147.68.MISMATCH!feeder.news-service.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Robert Klemme Newsgroups: comp.databases.oracle.server Subject: Re: ASM for single-instance 11g db server? Date: Mon, 04 Apr 2011 22:07:42 +0200 Lines: 26 Message-ID: <8vumomFpemU1@mid.individual.net> References: <9ab1e909-3324-41b4-a8aa-47d0516328a2@p13g2000yqh.googlegroups.com> <874d1a73-420f-4992-a86c-7a37a716623b@q36g2000yqn.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net NeBpFpv15Zm/DK/xmLeNtgUY/W0sSsDr3f2SvtSMr05W5qIQY= Cancel-Lock: sha1:gngjQcQqrjoympvzMcRq5WRm8HE= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.15) Gecko/20110303 Lightning/1.0b2 Thunderbird/3.1.9 In-Reply-To: X-Antivirus: avast! (VPS 110404-1, 04.04.2011), Outbound message X-Antivirus-Status: Clean Xref: news.cambrium.nl On 04.04.2011 15:10, Mladen Gogala wrote: > On Mon, 04 Apr 2011 05:32:31 -0700, John Hurley wrote: > >> You can "always" still fight thru setting up and using RAW type storage >> and avoid operating system overhead of file systems on linux if you want >> to. > > You can avoid that overhead with file systems, too. Use direct I/O and > there you have it. Oracle has filesystemio_options parameter since the > version 9i. Well, that would get rid of the OS level caching but not the file system overhead (managing inodes, blocks etc.). http://unixfoo.blogspot.com/2008/01/what-is-direct-io.html IIRC on Linux you would have to combine direct IO with raw device access to completely avoid OS level caching *and* FS overhead. Kind regards robert -- remember.guy do |as, often| as.you_can - without end http://blog.rubybestpractices.com/