We utilize your zabbix template, which is really amazing. We had small concern in this, That OpenNebula hosted VM and RAM size is not accurate.
Versions of the related components and OS (frontend, hypervisors, VMs):
OS: Ubuntu 20.04
Original Total VM: 52
Steps to reproduce:
We try to change template to get accurate data.
Still no result.
Attached the Screenshot.
Allocated CPU and Allocated Memory are not usage metrics. They are the resources that have been requested by the VMs placed on the host. The allocated resources do not necessarily have to be uses all the time, the VMs could be not even RUNNING and even if RUNNING they may not be using all of the resources assigned to the hypervisor.
Also note that the zabbix addon is an addon and not an official integration developed and maintained by OpenNebula.