time to read packets for HTTP query

[Frederik Nosi]

Hi Maxim,

On 09/11/2015 02:53 PM, Maxim Dounin wrote:
> Hello!
>
> On Fri, Sep 11, 2015 at 02:15:25PM +0200, Lukas Tribus wrote:
>
>>> Does not seem to do what the GP asked, from the docs:
>>>
>>> $request_time
>>> request processing time in seconds with a milliseconds resolution
>>> (1.3.9, 1.2.6); time elapsed since the first bytes were read from the client
>> "request time" would imply the time (with our without parsing) of the
>> actual HTTTP request, imho.
>>
>> In reality $request_time accounts for the complete request, response and
>> logging, so yes, you are right.
> While $request_time is indeed accounts for complete request time
> when used in logs, it can be accessed (and saved) at some
> intermediate point.  E.g., by using something like
>
>      set $header_time $request_time;
>
> one may save time since 1st bytes were read from a client till
> rewrite rule processing.  This is basically identical to "time
> necessary to read all the packets of a particular HTTP query" that
> was asked (at least as long you don't try to count reading a
> request body).

Thanks for explainig this, seems quite useful!