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Here we consider that if a HEADERS frame is made of more than 4 fragments whose average size is lower than 1kB, that's very likely an abuse so we count a glitch per 16 fragments, which means 1 glitch per 1kB frame in a 16kB buffer. This means that an abuser sending 1600 1-byte frames would increase the counter by 100, and that sending 100 headers per request in individual frames each results in a count of ~7 to be added per request. A test consisting in sending 100M requests made of 101 frames each over a connection resulted in ~695M glitches to be counted for this connection. Note that no special care is taken to avoid wrapping since it already takes a very long time to reach 100M and there's no particular impact of wrapping here (roughly 1M/s).
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)