What does \Processor(_Total)\% Processor Time mean. What are the underlying assumptions.
Description: As this is a performance counter from WAD Performance Table counter; as this is Azure is there any assumption for measuring the same.
This Azure counter is simply a recording of the Windows Performance Counter
The simplest measure of a system's busyness is Processor(_Total)\% Processor Time, which measures the total utilization of your processor by all running processes. Note that if you have a multiprocessor machine, Processor(_Total)\% Processor Time actually measures the average processor utilization of your machine (i.e. utilization averaged over all processors). from http://www.windowsnetworking.com/articles_tutorials/key-performance-monitor-counters.html
In Azure, I believe this counter is calculated over a fairly short sampling interval on each VM - so if you collect the sample every 10 seconds, say, then the instantaneous measurement will only tell you what was occurring near to each measurement point - it won't necessarily reflect what was occurring inbetween measurements.