How does the VMWARE probe is computing the GuestDisk/var/db_dump free space and where are the numbers taken from?
The probe uses the Managed Object Browser, which is a separate API designed specifically for other applications to grab metrics from the VMware instance. The probe grabs metrics straight from the MOB.
You can find information's via https://<ip>/mob
The data's given by VMware probe are the same as the information given by https://<ip>/mob
Please go to https://<IP>/mob
login is needed
next to childentity press on the number for your VM press on guests press on disk
that should bring up the GuestDiskInfo
capacity long 64317550592
diskPath string "C:\"
dynamicProperty DynamicProperty Unset
dynamicType string Unset
freeSpace long 28552278016
The formula would be freeSpace / capacity * 100
That is the value the probe is getting its information and not from any linux command.
This youtube video is walk through the mob