'How to get the size of a partition in Cosmos DB collection?

I am really surprised that I could not find this information.

I have seen a comment (without details) that there is a REST API to get this information. I will try to find this information.

Solution 1:^[1]

You can use azure cli to get the size of a mongo collection like this.

az cosmosdb mongodb collection show -g myRG -a mycosmosaccount -d mydatabase -n mycollection

I also think you can get this via REST API on Management Plane. API sample for that is here

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Solution	Source
Solution 1	Mark Brown