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It can be sometimes useful to measure total time of a request as seen from an end user, including TCP/TLS negotiation, server response time and transfer time. "Tt" currently provides something close to that, but it also takes client idle time into account, which is problematic for keep-alive requests as idle time can be very long. "Ta" is also not sufficient as it hides TCP/TLS negotiationtime. To improve that, introduce a "Tu" timer, without idle time and everything else. It roughly estimates time spent time spent from user point of view (without DNS resolution time), assuming network latency is the same in both directions.
The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)