Vishal, I'm struggling to work out how this behaviour affects the design choice in storage layout. On 26 Apr 2011 17:17, "Vishal Gupta" <vishal@xxxxxxxxxxxxxxx> wrote: On RHEL5, CFQ i/o scheduler is broken. Under heavy load performance improves with deadline i/o scheduler. On RHEL4 it does not give much benefit. There is linux bug for broken CFQ on RHEL5. http://www.google.co.uk/url?sa=t&source=web&cd=1&sqi=2&ved=0CBYQFjAA&url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D456181&ei=tDaKTcvzNeWG0QHYybzoDQ&usg=AFQjCNEKaFfKVmLhVeoMgJzoaGyeRXS15w http://www.google.co.uk/url?sa=t&source=web&cd=2&sqi=2&ved=0CBwQFjAB&url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D427709&ei=tDaKTcvzNeWG0QHYybzoDQ&usg=AFQjCNEZHzLC3u7lkB3nE-1ZNbI7hvboFQ http://www.google.co.uk/url?sa=t&source=web&cd=3&sqi=2&ved=0CCIQFjAC&url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D448130&rct=j&q=redhat%20cfq%20bug%20i%2Fo%20slow&ei=tDaKTcvzNeWG0QHYybzoDQ&usg=AFQjCNGdlO8BfKyUeWrifJLtybLszRGsBg Regards, Vishal Gupta http://www.vishalgupta.com ------------------------------ *From:* oracle-l-bounce@xxxxxxxxxxxxx on behalf of Kevin Closson *Sent:* Tue 26/04/2011 16:45 *To:* Oracle-L Subject: Re: ASM+internal disks Here's how I look at this. The following are true 1) there is no networked storage so all disks are ...
