My nginx status below:
Active connections: 1156598
server accepts handled requests
429477742 429477742 2435052040
Reading: 353 Writing: 45136 Waiting: 1111109
As we can see, there are 1111109 waiting connections.
But with ss -s I only get 24453 tcp connections:
Total: 17618 (kernel 0)
TCP: 24453 (estab 17007, closed 6489, orphaned 622, synrecv 0, timewait 6466/0), ports 0
Transport Total IP IPv6
* 0 - -
RAW 0 0 0
UDP 2 2 0
TCP 17964 17961 3
INET 17966 17963 3
FRAG 0 0 0
The value of Waiting connections is much higher than TCP connections, is it normal?
Those are keepalive connections. They are usually not a problem. But if you want lower the number reduce keepalive_timeout.
https://www.ruby-forum.com/topic/203409
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