Understanding time/latency fields from Application Gateway Access Logs

Question

Hi,

I am analyzing Access logs from Azure application gateway (table: AGWAccessLogs). I would like to clarify the meaning of below fields:

·       ClientResponseTime:

·       ServerResponseLatency

·       TimeTaken

 AGWResponseTimes.png

Azure metrics for application gateway provide a nice graphical view to understand the meaning of various metrices. I have used the same diagram and marked my understanding for above fields from logs. Please validate if this is correct.

Answer 1

@Rajiv Bansal ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I checked this internally and here is the response from our team,

• ServerRespLatency is equivalent to Backend Last Byte Response time
• TimeTaken is equivalent to AppGWTotalTime
• clientResponseTime doesn't have any corresponding metric
  • clientResponseTime as explained here is "Time difference (in seconds) between the first byte and the last byte application gateway sent to the client. Helpful in gauging Application Gateway's processing time for responses or slow clients."

From the Timing metrics diagram,

Thanks,

Kapil

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