Virtual services inherit from their SE group, the values for the minimum and maximum number of SEs on which they can be instantiated. Between the virtual service min/max values, the user can manually scale the virtual service out or in from the UI, CLI, or REST API. Also, within the same SE group, the current SEs virtual service instantiations can be migrated to other SEs. When the user hovers the cursor over, a popup message on the right dispays how these three actions can be accomplished from within the UI.
A virtual service’s maximum instantiation count may be below the maximum number of SEs in its group.
For information related to the SE group settings
max_scaleout_per_vs, refer to Impact of Changes to Min/Max Scaleout per Virtual Service.