Cannot totally switch off caching

[imanenkov]

Maxim Dounin Wrote:
> If you want to change nginx configuration - just add 
> $upstream_cache_status variable to a log, it will show if a 
> response was from nginx cache (HIT) or was requested from a 
> backend.
> 
> Other upstream-related variables may be interesting too, in 
> particular $upstream_response_time.  See here for more:

I add new log_format in /etc/nginx/nginx.conf:
log_format main '$remote_addr - $remore_user, $upstream_cache_status :
$upstream_response_time'

and assign this formatter to access.log.

On several times running on "caches/fast" site output is:
192.168.111.254 - -, - : 0.090
192.168.111.254 - -, - : 0.044
192.168.111.254 - -, - : 0.054
192.168.111.254 - -, - : 0.057
192.168.111.254 - -, - : 0.047
192.168.111.254 - -, - : 0.049
192.168.111.254 - -, - : 0.053

wait some time (~2 mins), run again, and another string:
192.168.111.254 - -, - : 23.998

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,240433,240485#msg-240485