To be able to see the Memory Usage Value including FS cache in Tactical Dashboard - Hardware Resources Scenario, we should update the Key Figure of the “Free Memory” metric from “Free Memory (KB)” to “Free Mem Incl FS Cache (KB)” in the template in System Monitoring.
To accomplish this, follow below steps:
1 - Go to transaction SOLMAN_SETUP
2 - Go to "System Monitoring" Scenario
3 - Go to "Template Maintenance" tab, then choose the right template
4 - Select "Free Memory" metric
5 - Update the key figure in the Data Collection tab.