Hi Karsten, I would also monitor the below stats in your case: * Total timed-out sessions via SILENT_TIMEOUT: for calls being cut because of no RTP media flow * Total timed-out sessions via FINAL_TIMEOUT: for calls timeout (assuming you have configured a correct value for both corresponding settings in your rtpengine config file) For each proxy you could also check the difference between total of delete requests and total of answer requests: there should be one delete for one answer. And one more thing: monitor the ongoing sessions for each of your RTPEngine proxies. If number increases significantly for no reason it could show some issues in the RTPEngine cleanup routine process. Note also there is a nice new feature in the last rtpengine releases to get all stats in a json format (the list jsonstats CLI command). From that you could easily create a monitoring system based on the metrics you want. Cheers Julien De : sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; au nom de Karsten Horsmann &lt;khorsmann(a)gmail.com&gt; Répondre à : "Kamailio (SER) - Users Mailing List" &lt;sr-users(a)lists.kamailio.org&gt; Date : mercredi 5 août 2020 à 08:42 À : &quot;sr-users(a)lists.sip-router.org&quot; &lt;sr-users(a)lists.sip-router.org&gt; Objet : [SR-Users] kamailio and rtpengine_manage() / rtpengine_delete() Hi list, 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. Any hints on what numbers are important? rtpengine-ctl -ip 127.0.0.1:4444<http://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 Kind Regards -- Mit freundlichen Grüßen *Karsten Horsmann*