The View DRS Summary page provides insight and perspective into the actions DRS is taking to balance a cluster. You can view DRS settings for the cluster and cluster balance metrics, and determine if recent vMotions are DRS- or user-initiated.

Where You Find the View DRS Summary Page

From the Home screen, select Workload Optimization under Optimize Performance in the left pane. Then select a cluster name in the Current Workloads pane. The dimmed View DRS Summary and Set DRS Automation links turn live. Click the link to display the DRS summary information.

Table 1. DRS Summary Values
Pane/fields Value
<cluster name> Name of the selected cluster
Automation Level Enabled/Disabled. DRS is running or not.
Migration Threshold Aggressive/Default/Moderate
Active Memory Used False/ nn%
Cluster Balance Shows the variations in the DRS cluster balance metric over time as DRS runs. The graph shows how DRS reacts to and clears any cluster imbalance each time it runs.
Cluster Imbalance The range of potential imbalance values, as expressed in vCenter DRS metrics.
Total Imbalance The level of imbalance in a cluster, as measured by vCenter DRS metrics.
Tolerable Threshold The upper limit of what is tolerable in cluster imbalance. Designated by a green dotted line, this is a vCenter DRS metric.
VM Happiness A bar graph summarizing the total happy and unhappy VMs in the cluster. For individual VMs, there is a presentation of performance metrics related to its happiness, such as %CPU ready time and memory swapped.
Happy VMs Total of happy VMs are shown in green. Click in the green zone to show a list of these VMs in the Happy/Unhappy VMs pane to the right.
Unhappy VMs Total of unhappy VMs is shown in red. To show a list of these VMs in the Happy/Unhappy VMs pane to the right, click in the red zone .
Happy/Unhappy VMs Lists by name all the VMs in the zone you clicked in the VM Happiness pane.
VM Metrics Shows the trend in VM happiness or unhappiness
Recent vMotions The number of recent vMotions, plotted against time.
vMotion Details Shows the number of DRS-initiated and user (non-DRS) initiated vMotions over time. You can choose which type you want to view.
Date/VM Date of a given vMotion.
Source/Destination Source and destination of moved VMs.
Type DRS-initiated or user initiated.