Openstack compute host shows resources in use incorrectly

Issue

• There are many instances and used resources on one compute node, however this utilization is not reflected in the 'openstack host show' output:

(overcloud) [stack@os-undercloud ~]$ openstack host show overcloud-novacompute-2.localdomain
+-------------------------------------+----------------------------------+-----+-----------+---------+
| Host                                | Project                          | CPU | Memory MB | Disk GB |
+-------------------------------------+----------------------------------+-----+-----------+---------+
| overcloud-novacompute-2.localdomain | (total)                          |  72 |   1546151 |     278 |
| overcloud-novacompute-2.localdomain | (used_now)                       |  84 |    151552 |       0 |
| overcloud-novacompute-2.localdomain | (used_max)                       |   4 |      4096 |       0 |
| overcloud-novacompute-2.localdomain | <id> |   4 |      4096 |       0 |
+-------------------------------------+----------------------------------+-----+-----------+---------+