I was trying to monitor the application up-time using CA APM/CEM. I would like to receive email alert when one of the application server is down. Therefore i go to "Investigator" under "CPU">>"CPU Processor Count", i configured the "Comparison Operator" to "Equals To" and both "Danger" and "Caution" as zero. Meaning when there is not CPU Processor active, send an alert. Then, I bring down the application server, the graph showing "no current value" instead of zero, i think this is the main reason why i was not able to receive email alert. Kindly advise.