Mendix has something called APM, which is a paid service.
You could configure APM in your application and add your application to that APM portal.
This will given you much more information on a fine grained level.
- Which microflow
- Which activity
- What is causing performance issues etc.
This one from memory because currently I have no longer Mendix application running on premise. But if I recall correctly when logging into those systems with m2ee you could issue an command to see which microflows are running and stop those. I never used a private cloud but my assumption would be that m2ee is available there also. For the documentation see github: https://github.com/mendix/m2ee-tools/blob/master/doc/README.md
Just wanted to mention that APM has been renamed to APD
Application Performance Monitoring and you can find it here