Please don't down vote this question as well. I have a genuine question and probably am not phrasing the question correctly. I asked the following question in serverfault and it was closed as "Not a real question".

https://serverfault.com/questions/490317/what-metrics-should-i-monitor-to-guarantee-scalability-high-availability?noredirect=1#comment547719_490317

Would you please let me know where I am offending the moderators? Is shortlisting metrics that indicate the scalability and HA of the website very broad question? Are requests for guidelines out of scope of Serverfault?

Regards, Raj