View the number of concurrent connections and connection status of Nginx, etc. under Linux.
1. View the number of concurrent requests for the Web server (Nginx Apache) and its TCP connection status:
Netstat-n | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} ' or:
Netstat-n | awk '/^tcp/{++state[$NF]} END {for (key in state) print key, "T", State[key]} ' return results are generally as follows:
Last_ack 5 (number of requests waiting to be processed)
SYN_RECV 30
Established 1597 (normal data transfer status)
Fin_wait1 51
Fin_wait2 504
Time_wait 1057 (number of requests processed, waiting for timeout to end)
Additional parameter Description:
CLOSED: No connection is active or in progress
LISTEN: The server is waiting to enter the call
SYN_RECV: A connection request has arrived, waiting for confirmation
Syn_sent: Application has started, open a connection
Established: Normal data transfer status
FIN_WAIT1: Application says it's done
Fin_wait2: The other side has agreed to release
Itmed_wait: Waiting for all packets to die
CLOSING: Both sides try to close simultaneously
Time_wait: The other side has initialized a release
Last_ack: Waiting for all packets to die
2. View the number of Nginx running processes
Ps-ef | grep Nginx | The number returned by Wc-l is the number of nginx running processes, and if Apache executes
Ps-ef | grep httpd | Wc-l
3. View the number of Web server process connections:
NETSTAT-ANTP | grep 80 | grep established-c
4. View the number of MySQL process connections:
Ps-axef | grep mysqld-c
View the number of concurrent connections and connection status of Nginx, etc. under Linux