VMware 4817V62 - vSphere - PC, Administration Manual

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Storage Performance
Use the vSphere Client datastore performance charts to monitor datastore usage. Use the guidelines below to
identify and correct problems with datastore performance.
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The datastore charts are available only in the overview performance charts.
The datastore is at full capacity when the used space is equal to the capacity. Allocated space can be larger
than datastore capacity, for example, when you have snapshots and thin-provisioned disks. You can provision
more space to the datastore if possible, or you can add disks to the datastore or use shared datastores.
If snapshot files are consuming a lot of datastore space, consider consolidating them to the virtual disk when
they are no longer needed. Consolidating the snapshots deletes the redo log files and removes the snapshots
from the vSphere Client user interface. For information on consolidating the datacenter, see the vSphere Client
Help.
Chapter 22 Working with Performance Statistics
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