2011/2/18 ??G??S ???O???S <co...@hua.gr>: > Tomcat 5.5 or 6.0 > Win XP or Vista (32) > > I've read the configuration > (http://tomcat.apache.org/tomcat-5.5-doc/config/valve.html) and the api > (http://tomcat.apache.org/tomcat-5.5-doc/catalina/docs/api/org/apache/catalina/valves/AccessLogValve.html) > but there are some details that are not specified: > > timestamp (%t in pattern) > In apache documentation it is stated that this is the time that the request > was received. I'd like some simple confirmation that this also holds true for > the tomcat (and is not, for example, the time that the response was sent). > > bytes sent (either %b or %B in pattern) > Is this the number of bytes actually sent to the client, or simply the size > in bytes of the HTTP response (which will differ, for instance, if the > connection is aborted)? The apache httpd 2.0 provides the %O format as well > to distinguish between these two cases, whereas in 1.3 it didn't. Since > tomcat does not provide such an option, my guess is towards the number of > bytes actually sent to the client, but I'd like some simple confirmation on > this. > > time taken (either %D or %T in pattern) > Is the network transmission time included in the processing time? To be more > precise, is this the time the server used to process, prepare the HTTP > response and deliver it to the underlying layer for transmission (i.e. > non-blocking threads on tcp send)? Or does it also include the underlying > layer sending time (e.g. blocking threads on tcp send)? Apache's > documentation is also obscure on that point... >
In short: regarding TC 5.5 and 6.0 your hopes are wrong. The timestamp is when the processing is the layer below the valve has ended (and the log statement is printed), with some caching of generated timestamp string (not worse than 1 sec). Time taken: time spend in the layer below the valve. The size is raw size, before gzip compression. In latest versions of TC7 (7.0.8 and later) the access valve has different implementation, and is directly invoked from the connector adapter layer. That version prints timestamp when request was received, timing for the whole request processing cycle (though '0' when it cannot be determined), reports count of bytes sent (taking compression into account). Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
