Add average response time per interval

[nedmax]

Add average response time per interval

[vozlt]

Thanks for good suggestion.
There are many similar requests like #43.
I have a plan to add the feature later but I'm a little tied up now.

[nedmax]

Ok @vozlt, no problem. Thanks.
We could close this one and keep with #43. Choose what works best for you.

[pavelnemirovsky]

IMHO there is a good approach implemented here https://github.com/yandex-sysmon/nginx-lua-stats

[vozlt]

I added that feature just now.
Please test...
Latest commit: 60aad47

[linbo]

@vozlt I check the code, looks it will average processing time for last 64 requests, right?

[vozlt]

By default, It use the 63(NGX_HTTP_VHOST_TRAFFIC_STATUS_DEFAULT_QUEUE_LEN - 1) of recent values to compute but It can be smaller than 63 by the period parameter in vhost_traffic_status_average_method.
It is a static buffer size.
So If you want to change it, you must change the below file.

$ vi src/ngx_http_vhost_traffic_status_node.h

  9 
 10 #define NGX_HTTP_VHOST_TRAFFIC_STATUS_DEFAULT_QUEUE_LEN  ...
 11 

Please see the directive vhost_traffic_status_average_method if you want to change the average formula.

[linbo]

@vozlt Thanks for the help.