Set the cluster full threshold
You can change the level at which the system generates a block cluster fullness warning using the steps below. In addition, you can use the ModifyClusterFullThreshold API method to change the level at which the system generates a block or metadata warning.
You must have cluster administrator privileges.
Click Cluster > Settings.
In the Cluster Full Settings section, enter a percentage in Raise a warning alert when _% capacity remains before Helix could not recover from a node failure.
Click Save Changes.