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Question by Pierre D. · Apr 28, 2014 at 11:20 PM · diagnostics

Understanding metrics values.

Hello,

could you correct me if I'm wrong:

schema.png 

Response time = start of A until  end of E

Duration = start of A until end of G

Exec sum = sum of all  (ie A+B+C+D+E+F+G)

CPU sum  = sum of time when CPU is working  (must be <=  A + C +E +G)

Wait Sum = sum of time when thread wait on a specific object to be notified. (ie Object.wait)

Suspension Sum= sum of time when thread are suspended because GC activity

Sync sum = thread wait another a resource (ie synchronized )

IO = Exec sum – CPU Sum - Wait Sum – Suspension Sum – Sync sum

 

Is there a way to know the time spent in B, D and F (ie communication layer.

Thanks

Pierre Devreux

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Answer by Rick B. · Apr 29, 2014 at 12:09 AM

B, D, and F are what is called "Inter-tier time" and you will get this in the Transaction Flow Diagram as long as you have an agent on both ends of each communication layer.

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