I haven't tried this feature yet, but following this guide Monitor security policies with Activity Monitoring and ensure they are being enforced correctly in NSX you should wait at least 5 minutes... Which NSX version are you using?
Only Windows VMs can utilize Guest Introspection at the moment. Not working / not supported for Linux (yet).
I did wait 5 min. I even waited 24 hours ;-) still nothing.
I am using NSX Manager 6.2.0 at this moment.
This is exactly what I thought as as well... just wanted to have it confirmed.
So in order to test this I need to fire up some VM's that are running an Windows OS.
Yes. Linux is under development but I have no info when it is going to be started to be supported.