On Thu, Mar 31, 2011 at 8:37 AM, Janne H <jannehso...@yahoo.com> wrote: > --- On Thu, 3/31/11, Mark Montague <m...@catseye.org> wrote: > >> > In the access log, what is acctually meassured with >> the %D option? >> > >> > %D The time taken to serve the request, in >> microseconds. >> > >> > but what is included in this time? Is the stopwatch >> started when the last byte of the request is received and >> stoped when the first byte of the response is ready to >> be sent? >> > >> > Or is the stopwatch started when the first byte of the >> request is received and stoped when the last byte of the >> response has been sent? That is, it is including network >> sending time? >> From the source code for httpd-2.2.17, >> modules/loggers/mod_log_config.c, line 650, %D is: >> >> apr_time_now() - r->request_time) >> >> "now" in this context means "the time at which the log line >> is being written". This is after all data has been >> sent to the client (logging the amount of data sent the the >> client is one of the things that can be logged). Note >> that the connection may remain open past the last byte being >> sent to the client (keepalive, etc.). >> >> r->request_time gets set in server/protocol.c, line 617, >> after the first non-blank line of the request (e.g., "GET / >> HTTP/1.1\r\n") >> made by the client is completely received. This is >> close to, but a little bit after (16 bytes after, in the >> example I just gave) the first byte of the request was >> received. So the time to receive the first line of the >> request is not counted in %D, but the time to receive any >> subsequent lines of the same request are counted. >> >> I hope this helps. >> > > Well, I'm still a little confused. > I'm trying to find out why the accesslog shows the line > > > ipA [31/Mar/2011] "GET /file.jpg HTTP/1.0" 200 42981 "-" "ApacheBench/2.3" > 3560 > ipB [31/Mar/2011] "GET /file.jpg HTTP/1.0" 200 42981 "-" "ApacheBench/2.3" > 93574 > > (the ipA is much "closer" to the server than ipB).
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