Cosmos DB Diagnostic Logs Not showing up RUs for Create operations

Question

Cosmos DB Diagnostic Logs Not showing up RUs for Create operations

TUDOR33SUD14 5

I am using CosmosDB for a while now, and I would like to take advantage of diagnostic logs to keep an eye on RU usage. Query logs work fine, HOWEVER my create requests are being logged with requestcharge equal to 0.

Does anyone have any idea why that happens? I attached a screenshot. Usually my writes are done using the batch API, so a write might resolve to a couple of items at a time in a transaction. The only RU usage that I'm seeing is for stored procedure.

Is this acceptable? Or is it a bug?
Here's a screenshot: Untitled.png

Mallaiah Sangi 95 Microsoft External Staff

Hi @TUDOR33SUD14

Thanks for the Question and using Microsoft Q&A platform.

As per my understanding your Question is, you are not able to see the create requests operation in Cosmos DB Diagnostic Logs.

Enable logs from Cosmos DB

In order to export logs from cosmos DB we need to create a Diagnostic setting.

Creating a Diagnostic setting

In your Azure portal, go to Cosmos DB resource and click on the Diagnostic settings menu under the Monitoring section of the sidebar.

click on the + Add diagnostic setting button.

We can have multiple diagnostic settings with different configurations and select the elect categories, basically each category represents a different kind of log being exported__.__

Category	Description
DataPlaneRequests	Logs
all operations related to creation, updation, deletion or retrieval of data.
DataPlaneRequests	Logs all operations related to creation, updation, deletion or retrieval of data.

For detailed steps, you can refer to the Azure documentation links.

How to enable and view logs from Cosmos DB

If you have any specific questions or need further assistance, feel free to ask!

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Follow

TUDOR33SUD14 5 Reputation points

2025-02-22T09:42:13.55+00:00

@Mallaiah Sangi Thanks a lot for your answer! As it is already visible on the screenshot I attached, I already did that and enabled cosmos db logs -> data plane requests + query runtime statistics etc. The problem is that even though I can see Create operations executed using batch api, the requestCharge is 0.

Do you have any idea why that might happen ? Here you can see my diagnostic settings. Diagnostic Settings.png
ShaktiSingh-MSFT 16,251 Reputation points

2025-03-03T05:33:36.1+00:00

Hi TUDOR33SUD14 •,

Welcome to Microsoft Q&A forum.

As I understand, you want to know if RequestCharge for Create should show up in query output or could be zero.

I am checking on this internally and will get back to you.

Thanks.
TUDOR33SUD14 5 Reputation points

2025-03-03T06:28:44.3933333+00:00

That sounds great thanks! Please see my screenshots for details!
ShaktiSingh-MSFT 16,251 Reputation points

2025-03-05T05:16:56.77+00:00

Hi TUDOR33SUD14 •,

Thanks for your patience, we are still awaiting reply from the internal team.

Your answer

Mallaiah Sangi 95 Reputation points Microsoft External Staff

2025-02-21T18:46:06.93+00:00

Hi @TUDOR33SUD14

Thanks for the Question and using Microsoft Q&A platform.

As per my understanding your Question is, you are not able to see the create requests operation in Cosmos DB Diagnostic Logs.

Enable logs from Cosmos DB

In order to export logs from cosmos DB we need to create a Diagnostic setting.

Creating a Diagnostic setting

In your Azure portal, go to Cosmos DB resource and click on the Diagnostic settings menu under the Monitoring section of the sidebar.

click on the + Add diagnostic setting button.

We can have multiple diagnostic settings with different configurations and select the elect categories, basically each category represents a different kind of log being exported__.__

Category Description

DataPlaneRequests Logs

all operations related to creation, updation, deletion or retrieval of data.

DataPlaneRequests Logs all operations related to creation, updation, deletion or retrieval of data.

For detailed steps, you can refer to the Azure documentation links.

How to enable and view logs from Cosmos DB

If you have any specific questions or need further assistance, feel free to ask!

If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

Follow
TUDOR33SUD14 5 Reputation points

2025-02-22T09:42:13.55+00:00

@Mallaiah Sangi Thanks a lot for your answer! As it is already visible on the screenshot I attached, I already did that and enabled cosmos db logs -> data plane requests + query runtime statistics etc. The problem is that even though I can see Create operations executed using batch api, the requestCharge is 0.

Do you have any idea why that might happen ? Here you can see my diagnostic settings. Diagnostic Settings.png
ShaktiSingh-MSFT 16,251 Reputation points

2025-03-03T05:33:36.1+00:00

Hi TUDOR33SUD14 •,

Welcome to Microsoft Q&A forum.

As I understand, you want to know if RequestCharge for Create should show up in query output or could be zero.

I am checking on this internally and will get back to you.

Thanks.
TUDOR33SUD14 5 Reputation points

2025-03-03T06:28:44.3933333+00:00

That sounds great thanks! Please see my screenshots for details!
ShaktiSingh-MSFT 16,251 Reputation points

2025-03-05T05:16:56.77+00:00

Hi TUDOR33SUD14 •,

Thanks for your patience, we are still awaiting reply from the internal team.

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Cosmos DB Diagnostic Logs Not showing up RUs for Create operations

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