I have a few hosts in a Cluster that always seem to report 0KB Memory free and the CPU average as 255%.
The two anomalies don't always go hand in hand, for example in a single 8 node cluster I have 4 of the 8 showing 255% CPU but only 3 appear to be reporting incorrect Memory. I haven't observed it enough to be 100% sure but I don't believe it's always the same hosts showing these problems.
It doesn't appear to be affecting the cluster in any way, they appear as balanced as I'd expect them to be. I've just <g class="gr_ gr_499 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace" data-gr-id="499" id="499">ran</g> a fresh job and looked at the host status within properties and they all appear to look good.
We have a separate 3rd party that also monitors infrastructure and this reports things like CPU and Memory correctly so this appears specific to the way SCVMM gets the data rather than a generic host issue.