SAP standard performance&healthy reference indexes values

Question

Dear Gurus,
In EWA report there are many sys performance & healthy indexes (see the list below).
We can evaluate the system's healthy status through them.
But we have to know the SAP standard reference values first.
My question is where I can find out the standard reference values for all of the indexes? (or some of the most important ones of them)
For instance , The index 'Reference for Avg. Response Time (ms) ' for DIA task is 1600ms.
Average Response Time/Dialog Step(ms)
Average Wait Time Per Dialog Step(ms)
AVerage Roll In Time(ms)
Average Load And Generation Time(ms)
Average Database Time Per Dialog Step(ms)
Average Processing Time Per Dialog Step(ms)
Average Roll Wait Time(ms)
Average GUI Time Per Dialog Step(ms)
AVerage CPU Time(ms)
Average DB Procedure Call Time/Transaction.(ms)
Average Lock Time Per Dialog Stepz(ms)
Average RFC Interface Time(ms)
Average Frontend Network Time(ms)
Requested Data(KB)
Number Of Roundtrips
Number Of VMC Calls
Total VMC CPU Time(s)
Total VMC Elapsed Time(s)
Average VMC CPU Time(ms)
Average VMC Elapsed Time(ms)
Number Of Dialog Steps
Thank you very much!
Jason

Answer 1

Hello Pravin Challa,
I've read the webpasges you offered.
I've learnt a lot from your help.
But there are still terms some terms confused me.
At the part 'Analysis of DB SQL CACHE' of our EWA report.
I can undstand some terms clearly. For instance,
'CPU Load [%]','I/O Load [%]','Elapsed Time [%]','Executions','Records Processed'.
I want to know their specific definition, computing interval and the unit of their value.
Thanks!
Jason