<HTML><BODY><p style="margin-top: 0px;" dir="ltr">Hello! I have kamailio 5.5 configured with digest authentication.<br> DB Mysql, 2 rtpengine one on the same server with kamailio, the other is separate.<br> Rtpengins work in bridge mode, internal/external/external-ipV6.<br> Kamailio listen 3 address: internal/external/external-ipV6 work in mixed mode: ipV4-ipV4, ipV4-ipV6, ipV6-ipV6.<br> OS Debian 10, CPU 1 core, Ram 4gb, Disk not ssd.<br> internal address is used for the gateway model of the connection to the PSTN. Before sending a call to PSTN, a request is sent to Billing by Diameter (request over the network, ims_charging ), Billing responds in the region of 10-17 milliseconds. usrloc db_mode = 0; UAS contacts are received according to the PUSH scheme (we send PUSH via http and get a REGISTER). children = 8 for each;<br> When running synthetic tests with sipp, I get 36 cps as a maximum, but there are a lot of retrans.<br> This is a test environment.</p>
<p dir="ltr"> Product:<br> I plan to get 100 cps; 20k concurrent calls, hardware will be 128GB RAM ddr4-2400; Intel Xeon Silver 4216, Optane SSD. 2 such servers, kamailio/rtpengine are configured exactly according to the scheme of the test environment.</p>
<p dir="ltr">Question:<br> Can you please tell me how many children, shm/pv do I need?<br> Is it worth going in the direction of asynchrony, or is the standard one enough for my purpose?<br> I will be very glad for any help.<br> Thank you!</p>
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