Why is my Cosmos DB storage defined in cost management higher than the actual storage capacity used by the actual data?

Allistair Vilakazi 0 Reputation points
2023-01-29T17:41:55.29+00:00

For context, I have 7 Cosmos DB accounts. They are all serverless and use the MongoDB API. And all this is living under the South Africa North (with availability zone) region.
For the last 30 days, my bill for 7 Azure Cosmos DB accounts will amount to $19.47.
Screenshot 2023-01-29 at 19.22.47

Additionally, in the last 30 days, the 7 accounts have incurred about 420k RU/s and 89k requests. More importantly, total data usage was 7.3MB.
Screenshot 2023-01-29 at 19.26.58

According to my understanding, I should get charged about $0.335/420000RUs = $0.15 for total request units used during the last 30 days. In terms of storage, I'd assume 7.3MB wouldn't amount to 75GB of data stored but somehow my cost management analysis on Azure Cosmos DB says that it does. In essence, I'd expect a bill at the end of the month for Azure Cosmos DB that would be multiple times less than the current $19.47.
Screenshot 2023-01-29 at 19.40.54

Am I missing something in my calculation of the total costs of running the database?
Thank you for your help.

Azure Cost Management
Azure Cost Management
A Microsoft offering that enables tracking of cloud usage and expenditures for Azure and other cloud providers.
2,075 questions
Azure Cosmos DB
Azure Cosmos DB
An Azure NoSQL database service for app development.
1,454 questions
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  1. JimmySalian-2011 41,926 Reputation points
    2023-01-29T22:09:44.7+00:00

    Hi,

    Usually the pricing are estimates and there are many factors that decide the costing of a Azure resource, I will suggest you to compare against the Cosmos DB calculator and discuss this with Microsoft blling team - https://cosmos.azure.com/capacitycalculator/

    Billing Team - https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request#go-to-help--support-from-the-global-header

    Hope this helps.

    JS

    ==

    Please Accept the answer if the information helped you. This will help us and others in the community as well.

  2. dkrishnaveni-MSFT 1,946 Reputation points Microsoft Employee
    2023-01-31T01:27:04.4166667+00:00

    If you still face issue when trying to create support request try reachning support via global customer support as shown below.

    https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2

    Ensure to share your preferred contact method and all the details about your query or issue and the team will connect with you.

    Hope this helps!

    Regards
    Divya.

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