When a Gy/Ro session record is refreshed, the appropriate histogram instance shall be incremented by 1. Gy/Ro sessions are refreshed during CCR-U and RAR processing.
Measurement Scope
Network, Place Association, Resource Domain
Recovery
This measurement shows a histogram of Gy/Ro session refresh durations, providing information to assist in setting the Stale Session Timeout for APNs that use this interface. If the Stale Session Timeout for an APN using the Gy/Ro interface is set too short, the session audit will remove the session prematurely, possibly causing signaling failures for subsequent in-session request processing needing topology hiding translations.
Note:
This measurement applies only sessions for which session state is being maintained. Online Charging DRA does not maintain Gy/Ro session state unless Session State applies to the session.
Histogram measurements consist of 101 array entries:
0 – Overflow. Incremented if duration is greater than 9,830 minutes.
1-5 – 1 minute buckets. Incremented for durations between 0 and 5 minutes.
6-10 – 5 minute buckets. Incremented for durations between 0 and 30 minutes.
11-15 – 10 minute buckets. Incremented for durations between 30 and 80 minutes.
16-20 – 30 minute buckets. Incremented for durations between 80 and 230 minutes.
21-100 – 120 minute buckets. Incremented for durations between 230 and 9,830 minutes.
