This is the current size of the SmartEvent events database. An admin tracks this alongside the configured database capacity to project how soon the database will need archiving or expansion, since SmartEvent's event-retention window, and thus its historical reporting and forensics ability, depends on staying ahead of this growth. For example, the size growing by several gigabytes per day during a period of heavy attack traffic would shorten the runway before hitting capacity sooner than the admin's usual maintenance schedule assumed.