Adaptive thresholds http://goo.gl/lLPKc would be good for prod environments as they have the consistent workload patterns, very good for alerting on sudden workload change. http://oracledoug.com/metric_baselines_10g.pdf http://oracledoug.com/adaptive_thresholds_faq.pdf -- Karl Arao Blog: karlarao.wordpress.com Wiki: karlarao.tiddlyspot.com Twitter: @karlarao <http://twitter.com/karlarao> -- //www.freelists.org/webpage/oracle-l