df command show free disk place which corresponds to Disk Space KPI in Command Central and as far as I can tell 1.8GB that CC is showing is somewhere close to DF 2% number.
The System Memory KPI shows use of machine Physical memory by the OS. CC uses JVM to report this number via standard JRE ManagementAgent. On few operating systems this KPI is usually reported in red as OS claims all available physical memory to implement its virtualization layer.
We’re aware of this issue of confusing report of used System Memory by the JVM. Currently there are no known workarounds to make it more in line with native OS tools.
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