Forum Discussion

thomsewe's avatar
thomsewe
Copper Contributor
Feb 21, 2019

Incorrect results from Log Analytics

I am seeing two different results from the same Log Analytics data set and don't understand why.   We are using Log Analytics to monitor our iis web servers.   If I run the query below is shows I...
Azure Log Analytics
azure monitor
Stanislav_Zhelyazkov's avatar
Stanislav_Zhelyazkov
MVP
Feb 22, 2019

Hi,

I think the differences comes from

itemCount

column. In that column you have different values. For example the value could be 1 or 10. This is caused by Telemetry sampling functionality. So the number of records in Application Insights does not corresponds exactly on total requests.

More on that here:

https://docs.microsoft.com/en-us/azure/azure-monitor/app/sampling

Let me know if that answers your question.