had the same on one pool that needed 97 updates. RPU was going great, but couldn't migrate VM post-upgrade it is a pool of 2 hosts, second hosts still had 97 patches to pass... even if RPU was finished. we waited 10 min and the 97 patches disappeared, and then we could migrate the VM

And of course there is the netdata plugin that can be enabled, https://xcp-ng.org/forum/topic/2288/netdata-package-is-now-available-in-xcp-ng Which will give you more performance metrics and health status.

@olivierlambert Thanks for that ill plan for the weekend to do that and see how it goes.