How does the VMWARE probe calculate the GuestDisk/var/db_dump free space and where are the numbers taken from?
The probe uses the Managed Object Browser (MOB), which is a separate API designed specifically for other applications to fetch metrics from the VMware instance. The probe gets the metrics straight from the MOB.
You can find information's via https://<ip>/mob
The data given by VMware probe are the same as the information given by https://<ip>/mob
Please go to https://<IP>/mob
login is needed
press content
press ha-folder-root
press ha-data-center
press ha-folder-vm
next to childentity press on the number for your VM press on guests press on disk
that should bring up the GuestDiskInfo
sample
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
https://www.youtube.com/watch?v=4waZg2juMxg