Jérome Perrin
authored
%Tt was not good, because it also included the idle time from previous request when the connection was reused, causing times recorded in log files to be much longer the actual request duration. %Ta - which is described as total active time for the HTTP request, between the moment the proxy received the first byte of the request header and the emission of the last byte of the response body - is much more suitable for our use case of measuring requests durations and is similar to apache's %D