Why the Capacity & Utilization data is not continuous for vms of vmware?

In my miq, the Capacity & Utilization data for vms of vmware is not continuous.

The same data for openstack is ok. Why this happens?
Any configuration mistake or other mistakes?
Thank you !

@dclarizio can you review this question from @wangxiangyu and forward to a SME if necessary.

Hi @wangxiangyu,

Are you sure those VMs are continuously running? Gaps are normally present if the VM is down for periods of time. Otherwise, there could be an issue collecting the data, although even if the collection misses data, it is supposed to fill in the gaps when it starts collecting again.

I’ll refer to @gtanzillo for other reasons why you might be seeing this.

. . . Dan