Memory usage by Email scanner

I have AVG Pro. I note that my AVG Email scanner is using a large amount of memory ranging from 13MB up to 8GB even when I have closed Outlook and turned off my AVG email protection. Why is this consuming so much memory?

Hi Con,
We understand your concern and will explain you in detail. The AVG software will take some memory to perform the  features in it. Not to worry It wont make much harm to your PC performance.
After finishing the process the memory assumption will get reduced. If you need any further assistance, please feel free to contact us. We are always here to help you with your issue.
Thank you