If enabled, this feature can be set to minutes, hours, or days, or Infinite Override Size.
For example, if you wish to create an hourly output that will aggregate data for the last day, then the output interval should be 1 hour, but override window size should be 1 day.
This option is useful when used in combination with upserts.
For example, if you want the latest total count of events per user, set the Override Window to infinite; in this case, every time an event arises for a user, the updated total count for the user is upserted, and the old record is deleted.