We are using App Insights to collect our custom metrics from our FastAPI backend app managed in AKS. We observed that after adding customDimensions, the count of the customeMetric of that name has increased significatly. See this is the only change after I noticed the incorrect number and rolled back the change and compare the following two screenshots, the first one is where we have customDimensions added the next one is after we rolled back our user traffic is pretty steady and we are certain that no other changes would affect this. We deployed the change on May 25 and the billing has gone crazy for it and we just rolled back yesterday to mitigate the issue

App Insights unexpectedly increased customMetrics count after addding customDimension

Steven Leng 10

We are using App Insights to collect our custom metrics from our FastAPI backend app managed in AKS.

We observed that after adding customDimensions, the count of the customeMetric of that name has increased significatly. See this is the only change after I noticed the incorrect number and rolled back the change User's image

and compare the following two screenshots, the first one is where we have customDimensions added User's image

the next one is after we rolled back
User's image

our user traffic is pretty steady and we are certain that no other changes would affect this.

We deployed the change on May 25 and the billing has gone crazy for it User's image

and we just rolled back yesterday to mitigate the issue

vipullag-MSFT 26,021 Reputation points

2024-06-06T05:03:34.6133333+00:00

Hello Steven Leng

Firstly, apologies for the delay in responding here and any inconvenience this issue may have caused.

This issue needs deeper investigation. Support team will be able to check and help on this. I would recommend you to open a azure support case.

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App Insights unexpectedly increased customMetrics count after addding customDimension