Get network connections from /proc/net/sockstat

Question

I founds this information in /proc which displays sockets:

$ cat /proc/net/sockstat 
sockets: used 8278
TCP: inuse 1090 orphan 2 tw 18 alloc 1380 mem 851
UDP: inuse 6574
RAW: inuse 1
FRAG: inuse 0 memory 0

Can you help me to find what these values means? Also are these values enough reliable or I need to search for it somewhere else?

Is these other way to find information about the TCP/UDP connections in Linux?

Answer 1

In my understanding the /proc/net/sockstat is The most reliable place to look for that information. I often use it myself, and to have one single server to manage 1MM simultaneous connections that was the only place I could reliably count that information.