The widget "VM Snapshots Created" in the "Virtual Machine - Snapshots" Dashboard in LI 4.0 seems to be broken. Even if taking multiple snapshots and setting the dashboard time span correctly, it stays on 0 and the other widgets on the dashboard remain empty.
It seems to stem from the field 'vmw_esxi_snapshot_operation', which doesn't seem to match any of the log events that ESXi or vCenter Server generates when taking a snapshot. This has been tested and validated in two completely separate vSphere 6.0 environments.
If changing to for example 'vmw_vm_state_transition_post' and filtering for "vm_state_create_snapshot" it matches much better.
Possible bug in the vSphere Content Pack?