Is there a practical limit to the number of resources that can be monitored with a single Application Insights resource?

Question

Is there a practical limit to the number of resources that can be monitored with a single Application Insights resource?

Frank van Eykelen 131

To simplify querying the logs (for making performance improvements) we started consolidating our per-app Application Insights resources into combined ones some time ago. The biggest one now tracks 90+ app services running .NET.

It looks like the Azure Portal has some trouble working with that many apps in a single Application Insights resource, because I've noticed trouble with rendering some pages, especially the "Roles" tab on the "Performance" page. Both Firefox and Chrome often show warnings about slow scripts when opening that tab or changing the time range ("A web page is slowing down your browser." and "Page Unresponsive")

Since this doesn't happen on App Insights resources with only a few resources there must be some number at which this starts occurring. So:

What is the max number of resources that can be tracked in a single Application Insights resource?
Can the Azure Portal or Application Insights teams maybe fix this problem?

bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-15T14:38:50.343+00:00

@Frank van Eykelen Apologies for the experience you are seeing and thanks for reaching out. Let me do some analysis on the scenario you are getting into and circle back with you.
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T01:09:51.473+00:00

@Frank van Eykelen My sincere apologies for delay in getting back to the thread.

In general , we have some throttling limits for Application Insights which has been documented here. Because of this throttling limits the server might refuse some of the requests. However if throttling occurs, a notification warning alerts you that this has occurred. However for the specific query you have on the number of resources that be can tracked for single application insights resource, the understanding is that the limits are on the volume of telemetry ingested, not the number of apps associated.

Unfortunately for the scenario you are getting into , it might need additional troubleshooting in collaboration with Azure Portal team to understand why we see this.
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T01:12:17.963+00:00

<<Extending the conversation from previous comment, because of the character limitation >>

@Frank van Eykelen - We might need deeper troubleshooting for the scenario you are getting into . So requesting you to raise a support ticket with our team so that they can loop in the right folks for further troubleshooting . Also, if there are any soft limits you are getting into because the data ingestion throttling our team can help review and lift the soft limit.

However if you have issues creating a support ticket, please let us know. Thanks
Frank van Eykelen 131 Reputation points

2021-04-21T07:54:11.993+00:00

I have created a support request titled "Support Request: Page Unresponsive errors on 'Roles' tab on the 'Performance' page"
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T14:40:50.317+00:00

@Frank van Eykelen Thank you for your response and creating a support ticket. We'll continue to investigate this with you directly and will update the thread with any findings that may help others. Thank you

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bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-15T14:38:50.343+00:00

@Frank van Eykelen Apologies for the experience you are seeing and thanks for reaching out. Let me do some analysis on the scenario you are getting into and circle back with you.
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T01:09:51.473+00:00

@Frank van Eykelen My sincere apologies for delay in getting back to the thread.

In general , we have some throttling limits for Application Insights which has been documented here. Because of this throttling limits the server might refuse some of the requests. However if throttling occurs, a notification warning alerts you that this has occurred. However for the specific query you have on the number of resources that be can tracked for single application insights resource, the understanding is that the limits are on the volume of telemetry ingested, not the number of apps associated.

Unfortunately for the scenario you are getting into , it might need additional troubleshooting in collaboration with Azure Portal team to understand why we see this.
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T01:12:17.963+00:00

<<Extending the conversation from previous comment, because of the character limitation >>

@Frank van Eykelen - We might need deeper troubleshooting for the scenario you are getting into . So requesting you to raise a support ticket with our team so that they can loop in the right folks for further troubleshooting . Also, if there are any soft limits you are getting into because the data ingestion throttling our team can help review and lift the soft limit.

However if you have issues creating a support ticket, please let us know. Thanks
Frank van Eykelen 131 Reputation points

2021-04-21T07:54:11.993+00:00

I have created a support request titled "Support Request: Page Unresponsive errors on 'Roles' tab on the 'Performance' page"
bharathn-msft 5,106 Reputation points Microsoft Employee Moderator

2021-04-21T14:40:50.317+00:00

@Frank van Eykelen Thank you for your response and creating a support ticket. We'll continue to investigate this with you directly and will update the thread with any findings that may help others. Thank you

Answer 1

<<Closing this thread with latest update for broader community usage>>

@Frank van Eykelen We really appreciate you taking time to work with our support team on this issue. At this point the initial analysis was to validate if you were hitting the throttling limit , but seems that you were not hitting that limit. However unfortunately we couldn't repro the issue consistently to further troubleshoot , so closed the issue for now. Please do circle back to us if you see any issue in future, will be happy to work with you to fix the issue. Thanks again.

Sharing this information for other customers who might get into similar issue. In case you are hitting the throttling limit 32,000 events/second you would see warning message on this and if you can reach out to our support team , they can further help you on this. Thanks

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Is there a practical limit to the number of resources that can be monitored with a single Application Insights resource?

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