On Wed, Aug 6, 2014 at 1:42 PM, Lu Jiang <dmarc-noreply@xxxxxxxxxxxxx> wrote: > The following is from the trace file: There should be more information than this in the trace file. If this is single instance then the old familiar deadlock graph should appear. If RAC then we should be seeing 'Global Wait-For-Graph' or similar. Since neither is here perhaps you could post more complete information? Jared Still Certifiable Oracle DBA and Part Time Perl Evangelist Sr Oracle DBA at Pythian Pythian Blog http://www.pythian.com/blog/author/still/ Oracle Blog: http://jkstill.blogspot.com Home Page: http://jaredstill.com