Configuring Cache Level Events
NCache event notifications let you design applications that react to various cache events. These notifications are disabled by default to save precious CPU and network resources. Events are fired upon addition, update and removal of an object or when cache is cleared. These notifications are off by default but can be turned on, for Clustered or Local Caches, as follows:
Click on the cache name in Cache Explorer to open cache settings.
Go to the Options tab.
Check Item add notification, Item remove notification and Item update notification check boxes.
Right click on the cache in Cache Explorer and select Apply Configuration option.