How to check concurrent connections?

Amitz

Dear all,

I wanted to find out how many concurrent connections my server is having on port 80. I thought that this should do the trick:

netstat -an | grep 80 | grep ESTA | wc

But the output consists of three numbers instead of one that I would have expected:

45     270    4005

What am I doing wrong, respectively why are there 3 numbers as output?

Thank you very much for any enlightment in advance!
Kind regards
-A

joepie91

Replace 'wc' with 'wc -l'

Elaboration: wc stands for word count, but it can count several things - bytes, words, and lines. Judging from your output, it's giving you the output in the format [lines words bytes]. Using the -l switch will tell it to only give you the line count.

Martin

If you use 'wc -l' instead of just 'wc' it will return the number of lines only.

Amitz

Thank you both!

prometeus

@Amitz said: netstat -an | grep 80 | grep ESTA

netstat -an | grep 80 | grep -c ESTA

Amitz

@prometeus: Cool! One command less! :-) Thanks!

speckl

If you are using Apache.
pgrep httpd | wc -l

Amitz

Thank you, but it's nginx!

sleddog

@Amitz said: Thank you, but it's nginx!

There's nginx's status module: http://wiki.nginx.org/HttpStubStatusModule

And a little script I wrote to make the output a bit more human-friendly: http://blite.ca/?t=19

Amitz

That's great! Thank you, sleddog!