vSphere Cluster Memory Metrics in VCF Operations

There are several vSphere Cluster Memory metrics in VCF Operations, formal documentation on these metrics can be found here. Not all of these definitions are as detailed as I'd like, so let's provide a summary.

Total Capacity (KB) - total capacity in KB, API Key is mem|totalCapacity_average. Hover description is "Amount of physical capacity configured on descendant ESX Hosts". In reality this is the sum of descendant ESXi Hosts Memory as shown below.

Usable Capacity (KB) - usable capacity in KB. API key is mem|haTotalCapacity_average. Hover description is "Memory resources available after subtracting reservations for vSphere HA (failover hosts/s) from the Clusters total memory capacity". In reality this is Cluster Memory Total Capacity - one Descendant ESXi Host Memory as shown below.

Usable Memory (KB) - usable memory in KB. API key is mem|host_usable. Hover description is "Usable Memory". In reality this is the sum of the ESX Hosts Usable Memory as shown here.

Memory Consumed (KB) - memory consumed in KB. API key is mem|consumed_average. Hover description is "Amount of host memory consumed by the virtual machine for guest memory". It's the sum of the ESXi Hosts Memory Consumed and looks like this.

Utilization (KB) - memory utilization in KB. API key is mem|total_need. Hover description is "Memory utilization level based on descendant Virtual Machine utilization. Including reservations, limits and overhead to run Virtual Machines". It's the sum of the ESX Hosts Memory Utilization. In the UI it looks like this.

Usage (%) - memory usage %. Hover description is "Memory currently in use as a percentage of total available memory". It's (Consumed / Total Capacity) x 100. In the UI it looks like this.

Hope this was helpful, enjoy!