The total number of Filtering Database entries that have been or would have been learned, but have been discarded due to a lack of storage space in the Filtering Database. If this counter is increasing, it indicates that the Filtering Database is regularly becoming full (a condition that has unpleasant performance effects on the subnetwork). If this counter has a significant value but is not presently increasing, it indicates that the problem has been occurring but is not persistent. Discontinuities in the value of the counter can occur at re-initialization of the management system.