[Bug] inconsistent "used capacity" in monitoring

[LeBovin]

Hello

Context

I have setup a test cluster of 8 nodes, each of them containing 4 identical drives of 1TB. Then I proceed to install a prometheus server on another server connected to the same local network.

The used capacity metric is displayed twice (on the two charts circled in red on my screenshot) but the value differs from one chart to another.

I just uploaded a 50GB folder on this cluster, so it seems the right value is the second one (74.3 GiB).

Additional information

OS: Ubuntu server 22.04.02 MinIO version

minio version RELEASE.2023-03-13T19-46-17Z (commit-id=c7f7e67a100ce35af559e3f49a2ed0b67deaa919)
Runtime: go1.19.7 linux/amd64
License: GNU AGPLv3 <https://www.gnu.org/licenses/agpl-3.0.html>
Copyright: 2015-2023 MinIO, Inc.

Prometheus version

prometheus, version 2.43.0 (branch: HEAD, revision: edfc3bcd025dd6fe296c167a14a216cab1e552ee)
  build user:       root@8a0ee342e522
  build date:       20230321-12:56:07
  go version:       go1.19.7
  platform:         linux/amd64
  tags:             netgo,builtinassets

Loadbalancer: None, everything is routed to the first node