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Change in Admission Control Capacity does not get updated in VMware vCenter Server

Symptoms

  • Changes to the Admission Control Capacity are not updated immediately in vCenter Server 
  • You can Enable HA Admissions Control without issues, even if the child resource pool have greater reservation than actual available memory
  • When you disable or re-enable the admission control policy, the new values get updated

Resolution

Change in values in Admission Control Capacity are only picked up by periodically by running validator. The default value is 1800 seconds (30 minutes). However, you can change it using the config.vpxd.cluster.ResourceMgmtValidator advanced settings. When you make any changes in cluster, it is considered a cluster configuration change, and the new values will be computed on such events. For example, moving a host from one cluster to another, cluster configuration change, initialize a DRS/HA cluster.
 
By design, HA will only reserve resources from the root Resource Pool for fail-over and it will not reserve resources from child Resource Pools. So, when setting the reservation on the Root Resource Pool, you must take into account the total reservation needed for all child resource pools.

Tags

HA-admission-control

See Also

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