6.4

5 To analyze the second recommendation, vMotion some Virtual Machines to a different Datastore,
add related charts to the workspace.
a Enter vm in the metric list search text box.
b Double-click the Summary | Total Number of VMs metric to add it to the workspace
c Compare the 4 charts.
For example, if the Summary | Total Number of VMs chart shows that the number of virtual
machines did not increase enough to negatively aect the data store, then moving some of the
virtual machines is a solution, but it does not address the root cause.
6 To analyze the third recommendation, Delete unused snapshots of virtual machines, add related charts
to the workspace.
a Enter snapshot in the metric list search text box.
b Double-click the following metrics to add the charts to the workspace:
n
Disk Space | Snapshot Space (GB)
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Disk Space Reclaimable | Snapshot Space | Waste Value (GB)
c Compare the charts.
For example, if the amount of Disk Space | Snapshot Space (GB) increased and the Disk Space
Reclaimable | Snapshot Space | Waste Value (GB) indicates an area where space can be reclaimed,
then deleting unused snapshots will positively aect the data store disk space problem and resolve
the alert.
7 If this is a problematic data store that you must continue to monitor, you can create a dashboard.
a Click the Generate Dashboard buon on the workspace toolbar.
b Enter a name for the dashboard and click OK.
In this example, use a name like Datastore disk space.
The dashboard is added to your available dashboards.
You compared metric charts to determine if the recommendations are valid and which recommendation to
implement rst. In this example, the Delete unused snapshots of Virtual Machines recommendation appears
to be the most likely way to resolve the alert.
What to do next
Implement the alert recommendations. See “Run a Recommendation On a Datastore to Resolve an Alert,”
on page 18.
Run a Recommendation On a Datastore to Resolve an Alert
As a network operations engineer, you investigated the alert regarding datastore disk space and determined
that the provided recommendations will resolve the problem, particularly the recommendation to delete
unused snapshots. You use vRealize Operations Manager to delete the snapshots.
If you have not enabled actions in the vCenter adapter, you can manually delete the snapshots on your
vCenter Server instance.
Prerequisites
n
Compare the metric charts to identify the likely root cause of the alert. See “Compare Alerts and Events
Over Time in Response to a Datastore Alert,” on page 15 .
vRealize Operations Manager User Guide
18 VMware, Inc.