Having a significant performance issue with a Windows POD in AKS compared to similarly sized VM equivalent

David Roy 0

Have a Windows-based Container environment built, running in an AKS environment. The application performance (IIS-based Application) in the POD is significantly slower than a similarly sized VM - even when the VM is using all OTHER constructs the same (App Gateway, SQL, Storage Account, etc).

Pure IIS serving works well with quite low latency of a response. An ASP page being served is working very slowly at even small scale.

Issue is that despite enabling insights and looking for bottlenecks - none are being found. No quota issues are being seen, no IO issues it seems, CPU is well under the threshold of concern... but perhaps I am just not getting the visibility needed.

Any "insights" you may have would be appreciated!

vipullag-MSFT 26,021 Reputation points

2023-07-19T06:35:06.18+00:00

Hello David Roy

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.

If you don't have a support plan enabled on your subscription, I request you to send an email to AzCommunity@Microsoft.com with Subject as "Attn:Vikas" referencing this thread along with your subscription ID. I can then enable your subscription with a one-time free technical support.

Once the issue is resolved, request you to post the resolution here for the benefit of community.
Shaun Lefeuvre 0 Reputation points

2023-09-14T15:55:11.35+00:00

Hi folks, we're seeing similar behavior when running Windows container on EKS. Can you share if any progress was made identifying root cause?

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Having a significant performance issue with a Windows POD in AKS compared to similarly sized VM equivalent