I've set up a Function app for sending incoming messages from IoT Hub to a CosmosDB. Everything works fine and the data is stored in a table. However, even if the function is not triggered, I exceed for "Storage, Tiered Block Blob, Hot Read Operations" by over 1000% as shown below.
Tried digging into it by looking at logs for the Storage account after talking with someone from the billing support team.
Found multiple blob operations happening per minute and I have no idea why. Is this normal? All of them have the same request URL:
https://[mystorageaccount].blob.core.windows.net/azure-webjobs-eventhub/ihsuproddbres022dednamespace.servicebus.windows.net/iothub-ehub-plantpihub-10052448-d94c18a7fe/$default/[...]