You can change the percentage of space allocated for host cache or disable the host's ability to swap to host cache.

Launch the vSphere Client and log in to a vCenter Server system.

You must have an SSD-backed datastore in your inventory.

1

In the vSphere Client, select the host in the inventory.

2

Click the Configuration tab.

3

Under Software, click Host Cache Configuration.

4

Select the datastore in the list and click Properties.

5

Select a size for the host cache allocation on the drive.

6

To disable the ability for the host to swap to host cache on a per-datastore basis, deselect the Allocate space for host cache check box.

7

Click OK.