Thanks for posting the question in Microsoft Q&A forum.
The memory working set graph indicates the deployment of the function. It appears that there are no exceptions because the function is not getting triggered. I would suggest you to check the integration section of the eventhub function and see if the eventhub connection string, Hubname and consumer group are properly configured.
Once this is done, check if the eventhub is receiving the events and what is the status of the consumer (Function) in the Eventhub portal. Also make sure you are using the latest version of function extension : https://www.nuget.org/packages/Microsoft.Azure.WebJobs.Extensions.EventHubs
I hope this helps!
Please 'Accept as answer' and ‘Upvote’ if it helped so that it can help others in the community looking for help on similar topics.