Change the maximum time interval for refreshing NPU-offloaded sessions. The default refresh time is 40 seconds. The range is 10 to 1000 seconds.
To free up NP7 memory you can reduce this session timeout so that inactive sessions are removed from the session table more often. However, if your NP7 is processing sessions with long lifetimes, you can increase the max-session-timeout to reduce how often the system checks for and removes inactive sessions,