Path: news.cambrium.nl!textnews.cambrium.nl!feeder2.cambriumusenet.nl!feed.tweaknews.nl!194.109.133.84.MISMATCH!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!feeder.erje.net!weretis.net!feeder1.news.weretis.net!news.solani.org!not-for-mail From: Mladen Gogala Newsgroups: comp.databases.oracle.server Subject: Re: New dirty tricks in Red Hat 5.x Date: Wed, 20 May 2009 21:26:43 +0000 (UTC) Organization: solani.org Lines: 16 Message-ID: References: <77897781-ca88-46cc-a33d-7c4635b1098a@n7g2000prc.googlegroups.com> NNTP-Posting-Host: eJwFwQkBACAIBLBKwPHGEYX+EdwMzn5D3VxtbUlfZoJ8mlq8PO5ADjmJBJi7GwbLkrgvezRQOha11enn3MhZfc1LrMuvgxD1ILGDsfMBTOodog== Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: solani.org eJwNzAEBwCAIBMBKoA9CHHmwf4TtApxtV+eBm8OePRK6Ccvq22PUmbAzRCCbbmZvU2jhNdoHOguJDYYqinFX8+myERFodAkqCu+mnEiZdyZm/t0T17gr1i4pPnOuZPacalub9yYj5APAgyxy X-Complaints-To: abuse@news.solani.org NNTP-Posting-Date: Wed, 20 May 2009 21:26:43 +0000 (UTC) Cancel-Lock: sha1:CWWd7zBq2yhQkFx7wc4qvPQ4OQc= User-Agent: Pan/0.133 (House of Butterflies) Xref: news.cambrium.nl On Wed, 20 May 2009 09:35:40 -0700, joel garry wrote: > Not sure I quite understand this own piece of disk thing, won't it be > mooted by controller bottlenecks? Of course, but that's not the point. The "ionice" command helps you prioritize I/O done by processes. The class 1 is "real time", the class 3 is "idle". Process in class 1 with the priority 0 has the highest I/O priority, any other process will have to wait for the LGWR to complete. If LGWR is the only process doing I/O on that particular disk, there will be no gain. -- http://mgogala.freehostia.com