This value reports how long, in seconds, stale (inactive) entries are currently allowed to remain in the Identity Management database before being aged out, a duration that the switch automatically shortens as memory usage climbs into higher tiers to free up space. Administrators use this to understand that under memory pressure, previously-learned identity entries may be evicted faster than the administrator's baseline configuration would normally allow. For example, this value might drop from a normal setting of 3600 seconds down to a much shorter interval like 300 seconds once the database's memory usage climbs into the critical tier, causing older entries to be purged more aggressively.