What sense can be made out of TIME_WAIT, CLOSE_WAIT, ESTABLISHED

performance analytics connections

7,397

Hopefully this will help, detailed explanation here:-

CLOSED Indicates that the server has received an ACK signal (to acknowledge receipt of a packet) from the client and the connection is closed.
CLOSE_WAIT Indicates that the server has received the first FIN signal (to acknowledge there is no more data to be sent) from the client and the connection is in the process of closing.
ESTABLISHED Indicates that the server received the SYN signal (synchronize, this signal is only sent in the first packet) from the client and the session is established.
FIN_WAIT_1 Indicates that the connection is still active but not currently being used.
FIN_WAIT_2 Indicates that the client just received acknowledgement of the first FIN signal from the server.
LAST_ACK Indicates that the server is in the process of sending it's own FIN signal.
LISTENING Indicates that the server is ready to accept a connection.
SYN_RECEIVED Indicates that the server just received a SYN signal from the client.
SYN_SEND Indicates that this connection is open and active.
TIME_WAIT Indicates that the client recognises the connection as active, but not currently being used.

7,397

Hao

It is not the answer that enlightens, but the question. --Eugène Ionesco The drop of rain maketh a hole in the stone, not by violence, but by oft falling. --Hugh Latimer There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle. –- Albert Einstein You want to be better no matter it is to advance or to go back. - Hao

Updated on September 18, 2022

Comments

Hao over 1 year
Using netstat command, I got the number of couple of TCP states of connections. But for running websites, how to make meaningful connections between these numbers and the bottleneck/performance of the website?
```
TIME_WAIT 2363
CLOSE_WAIT 5
FIN_WAIT1 32
FIN_WAIT2 161
ESTABLISHED 643
SYN_RECV 28
CLOSING 1
LAST_ACK 26
```
Please save the manual-kind links and share some practical knowledge, thanks!
- Pacerier over 8 years
  
  See superuser.com/questions/173535/…
Hao about 12 years

So 2363 (TIME_WAIT) means 2363 online users at current time? ( They are more or less visiting the website?)
toomanyairmiles about 12 years

@Jusfeel Well, that's the number of unused connections - given that a http connection is accessing one resource that doesn't really mean users.
Pacerier over 8 years

@toomanyairmiles, Isn't this question off-topic here?