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By using the WebSocket module we noticed that the memory on the server keeps increasing daily even if the number of registered devices is decreasing
Connect to the server through the wss and then disable the network adapter.
If the TCP connection is closed forcefully (tested by disabling network adapter) then the number of current wss connections is not decreasing:
kamcmd stats.get_statistics all | grep "ws_current_connections"
The same happens with the allocated shared memory:
kamcmd mod.stats all shm | grep 'wsconn_'
wsconn_add(198) - this value is not decreasing.
Everything is working properly if the TCP connection is properly closed.
CentOS 7 X64
3.10.0-1160.76.1.el7.x86_64
version: kamailio 5.6.1 (x86_64/linux) d8f98b
XHTTP Request Route:
event_route[xhttp:request] {
set_reply_close();
set_reply_no_connect();
if (ws_handle_handshake()) {
xlog("L_INFO", "[$cfg(route)] websocket|log|handled HTTP request $rm from $si:$sp\n");
exit;
}
}
TCP Settings:
tcp_connection_lifetime=3605
tcp_accept_no_cl=yes
tcp_rd_buf_size=16384
tcp_connect_timeout=10
tcp_crlf_ping=yes
tcp_delayed_ack = yes
tcp_fd_cache = yes
tcp_keepalive = yes
tcp_keepcnt = 3
tcp_keepidle = 30
tcp_keepintvl = 10
tcp_accept_aliases=no
tcp_async=yes
tcp_linger2=30
tcp_max_connections=4096
tcp_send_timeout = 10
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