<p></p>
<p>Hi Henning,</p>
<p>After full night of production traffic I discovered this is not related to RTT, as happens to low-latency proxies too (~10ms no packet loss).<br>
Interesting part is that it hapens 99.9% in BYE so I think it may be related to rtpengine_delete() and fetching call stats like described in docs</p>
<pre><code>5.5.  rtpengine_delete([flags])
Tears down the RTP proxy session for the current call. This populates the statistics pseudovariables (such “mos_min_pv” etc).
</code></pre>
<p>last night statistics - 83k calls:</p>
<pre><code>root@kamailio5:~# grep -c 'ksr_lwsc_callback(): losing read buffer of 4096 bytes' /var/log/syslog
1433
root@kamailio5:~#
</code></pre>

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