Overview
Accelerated aging threshold, Scaling Factor, and Application trickling values are related to sessions in the Palo Alto Networks devices. These values are included in the information displayed by the show session info command.
Accelerated aging threshold and Scaling Factor
Once the session table reaches the Accelerated Aging Threshold (% full), the scaling factor will be applied to all sessions. The session's idle time will be calculated as the actual idle time * scaling factor. For example, if a scaling factor of 10 was used, a session that would normally time-out after 3600 seconds will time-out after 360 seconds, instead. Accelerated aging is performed across the full session table.
Application trickling
Application trickling is basically a resource-protection mechanism. The application-layer processing is resource-intensive. When resource (packet buffer, etc.) utilization exceeds configured threshold, software will start scanning sessions. If a session has been inactive longer than the trickling threshold configured, the buffering resource occupied by this session will be freed.
See also
owner: akawimandan