High memory usage by avd process

Recently we have deployed two XG 105, both in a small environment (about 15 users), until now we have not enabled any filter, the XG is just routing the connection to the internet even though we are seeing a high memory utilization (80%+) and seeing on the top command we see the avd process consuming 22% of memory and java consuming 13%, is that normal?

In a second moment, we intend to enable the web filter, ATP and Sandstorm and we are afraid that the firewall can't handle it.

Thanks.