I use rtpengine 7.2.1 branch with kamailio 5.2.x and 5.3.x in different setups.
Due to some issues with my 5.2.x config I saw the "Total timed-out sessions via TIMEOUT" grow but "Total regular terminated sessions never" goes up from 0.
That was an indicator for an non-existing rtpengine_manage() or rtpengine_delete() at the end of dialogs. Okay.
Now I want to observe that a bit more.
I use parallel forking to webrtc clients, that i guess will be the "more Offers" than Answers.
rtpengine-ctl -ip
127.0.0.1:4444 list totals
Total statistics (does not include current running sessions):
Uptime of rtpengine :27726 seconds
Total managed sessions :3435
Total rejected sessions :0
Total timed-out sessions via TIMEOUT :0
Total timed-out sessions via SILENT_TIMEOUT :0
Total timed-out sessions via FINAL_TIMEOUT :0
Total timed-out sessions via OFFER_TIMEOUT :0
Total regular terminated sessions :3435
Total forced terminated sessions :0
Total relayed packets :69127802
Total relayed packet errors :5063
Total number of streams with no relayed packets :128
Total number of 1-way streams :8
Average call duration :233.321876
Graphite interval statistics (last reported values to graphite):
Total calls duration :0.000000
Min managed sessions :0
Max managed sessions :0
Min/Max/Avg offer processing delay :0.000000/0.000000/0.000000 sec
Min/Max/Avg answer processing delay :0.000000/0.000000/0.000000 sec
Min/Max/Avg delete processing delay :0.000000/0.000000/0.000000 sec
Min/Max/Avg offer requests per second :0/0/0 per sec
Min/Max/Avg answer requests per second :0/0/0 per sec
Min/Max/Avg delete requests per second :0/0/0 per sec
Control statistics:
Proxy | Offer | Answer | Delete | Ping | List | Query | StartRec | StopRec | Errors | BlkDTMF | UnblkDTMF
127.0.0.1 | 3896 | 3757 | 3499 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0