fastcgi_response_time ?

[Maxim Dounin]

Hello!

On Mon, Mar 10, 2014 at 01:51:54PM +0100, etienne.champetier at free.fr wrote:

> Hi
> 
> I'm using nginx in front of fastcgi servers (fastcgi_pass ...),
> I would like to have in my logs the response_time and the fastcgi_response_time (which doesn't exist),
> is it possible?
> 
> I've tried upstream_response_time but it's always the same value as fastcgi_response_time,
> even with slow connection (simulated with Network Link Conditioner on a mac)

There are two variables available:

- $request_time, time elapsed since first bytes were read from a 
  client;

- $upstream_response_time, time elapsed since a request was sent to 
  an upstream till last bytes of a response were got from an 
  upstream.

Most noticeable difference between these variables is that 
$request_time includes time taken to read a request from a client.  
This difference can be easily seen by typing a request by hand, 
line by line, in telnet.

[1] http://nginx.org/en/docs/http/ngx_http_core_module.html#var_request_time
[2] http://nginx.org/en/docs/http/ngx_http_upstream_module.html#variables

-- 
Maxim Dounin
http://nginx.org/