After integrating new Azure SDK we are seeing the APIs are slower. Can you please help us understand what might be causing this?

Question

After integrating new Azure SDK we are seeing the APIs are slower. Can you please help us understand what might be causing this?

Parag Rahangdale 5

Instance view is talking in older API [ took 0.49 sec] /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachines/{vmName}/instanceView

const APIVersion = "2020-06-01" queryParameters := map[string]interface{}{

"api-version": APIVersion,

}

Instance view is talking in newer API [took 1.24 sec] /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Compute/virtualMachines/{vmName}/instanceView

reqQP.Set("api-version", "2022-03-01")

At both points the inventory was same.

Parag Rahangdale 5 Reputation points

2025-05-27T07:51:23.62+00:00

Hi @Vamsi Ram Annepu , thanks for replying. Some clarifications, both the request were made from the same machine following same network route and we are in general seeing average degradation of 40% in response time of all API's. I am inclined to believe that this is cases by the last point that you have mentioned. Do you have anyway to get any metrics surrounding the API response time with newer version of API vs older version.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-27T08:39:02.0366667+00:00

Hi Parag Rahangdale,
As far as I know unfortunately there isn't a direct way to test backend performance or latency in API between newer version of API vs older version.
For more information you can look into the below previous thread
https://learn.microsoft.com/en-us/answers/questions/1528148/investigating-slow-response-time-in-azure-api-mana
Feel free to reach out if you have any further queries.

If you found the information useful, please click "Upvote" on the post to let us know.

Thank You.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-28T01:25:39.81+00:00

Hi Parag Rahangdale,
Just checking in to see if you had an opportunity to look into the previous comment posted on your question.
Feel free to reach out if you have any further queries.

If you found the information useful, please click "Upvote" on the post to let us know.

Thank You.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-29T04:03:43.9033333+00:00

Hi Parag Rahangdale,
I wanted to check if you had the opportunity to review the information which was provided in my previous posted comment.

If it was helpful, please click "Upvote" on the post to let us know.

Thank You.
Parag Rahangdale 5 Reputation points

2025-05-29T04:42:37.5233333+00:00

Hi @Vamsi Ram Annepu , we are surely seeing the drastic change in response time with same azure account, while trying to make same api request. The response provided really doesn't help us as you are neither confirming nor denying that the reponse times have changed. We have provided the exact api request as well, could you try this in your setup and let us know if you also observe the differences or it this related to our setup only.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-29T15:01:23.8766667+00:00

Hi Parag Rahangdale,
I have tried the same in my environment and we have also faced a similar issue but with a lower difference due to lower number of dependencies.
APIVersion = "2020-06-01"

APIVersion ="2022-03-01"

We will keep this case open and check further on this and get back to you as soon as we get an update.
In the mean while it is advised to try using the latest version of API available on your VM to try reducing the latency

Feel free to reach out if you have any further queries.

1 answer

Your answer

Parag Rahangdale 5 Reputation points

2025-05-27T07:51:23.62+00:00

Hi @Vamsi Ram Annepu , thanks for replying. Some clarifications, both the request were made from the same machine following same network route and we are in general seeing average degradation of 40% in response time of all API's. I am inclined to believe that this is cases by the last point that you have mentioned. Do you have anyway to get any metrics surrounding the API response time with newer version of API vs older version.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-27T08:39:02.0366667+00:00

Hi Parag Rahangdale,
As far as I know unfortunately there isn't a direct way to test backend performance or latency in API between newer version of API vs older version.
For more information you can look into the below previous thread
https://learn.microsoft.com/en-us/answers/questions/1528148/investigating-slow-response-time-in-azure-api-mana
Feel free to reach out if you have any further queries.

If you found the information useful, please click "Upvote" on the post to let us know.

Thank You.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-28T01:25:39.81+00:00

Hi Parag Rahangdale,
Just checking in to see if you had an opportunity to look into the previous comment posted on your question.
Feel free to reach out if you have any further queries.

If you found the information useful, please click "Upvote" on the post to let us know.

Thank You.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-29T04:03:43.9033333+00:00

Hi Parag Rahangdale,
I wanted to check if you had the opportunity to review the information which was provided in my previous posted comment.

If it was helpful, please click "Upvote" on the post to let us know.

Thank You.
Parag Rahangdale 5 Reputation points

2025-05-29T04:42:37.5233333+00:00

Hi @Vamsi Ram Annepu , we are surely seeing the drastic change in response time with same azure account, while trying to make same api request. The response provided really doesn't help us as you are neither confirming nor denying that the reponse times have changed. We have provided the exact api request as well, could you try this in your setup and let us know if you also observe the differences or it this related to our setup only.
Vamsi Ram Annepu 915 Reputation points Microsoft External Staff Moderator

2025-05-29T15:01:23.8766667+00:00

Hi Parag Rahangdale,
I have tried the same in my environment and we have also faced a similar issue but with a lower difference due to lower number of dependencies.
APIVersion = "2020-06-01"

APIVersion ="2022-03-01"

We will keep this case open and check further on this and get back to you as soon as we get an update.
In the mean while it is advised to try using the latest version of API available on your VM to try reducing the latency

Feel free to reach out if you have any further queries.

Answer 1

Hi Parag Rahangdale,
It looks like you are facing issue with the speed of APIs after integrating new Azure SDK.
This can be caused due to various factors which you can check by doing the following: -

Start with diagnostic settings logs which has different properties that help in identifying where the slowness occurs. You can use the below query as example (for Azure Monitor):
ApiManagementGatewayLogs

| where TimeGenerated > ago(1d)

| extend ApimTime = TotalTime - (BackendTime + ClientTime)

| project TimeGenerated, TotalTime, BackendTime, ClientTime, ApimTime, CacheTime, BackendMethod, BackendUrl, BackendResponseCode, Url, ResponseCode,

LastErrorMessage, LastErrorReason, LastErrorSource, LastErrorSection, ApiId, ProductId, OperationId

There can be a Network Latency Issues which you can check by ping and look into the below link for more information of network latency
https://learn.microsoft.com/en-us/azure/expressroute/expressroute-troubleshooting-network-performance#tools

In few cases the new API versions may introduce additional checks or features that could affect performance which may cause latency. Microsoft always tries to improve issues in the subsequent minor releases for smooth running of the Latest version based on the previous releases.
https://azure.microsoft.com/en-us/updates/?product=virtual-machines))

Feel free to reach out if you have any further queries.

If you found the information useful, please click "Upvote" on the post to let us know.

Thank You.

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After integrating new Azure SDK we are seeing the APIs are slower. Can you please help us understand what might be causing this?

1 answer

Your answer