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Now, if a pool_alloc() fails for a buffer and if conditions are met based on the queue number, we'll try to get an emergency buffer. Thanks to this the situation is way more stable now. With only 4 reserve buffers and 1 buffer it's possible to reliably serve 500 concurrent end- to-end H1 connections and consult stats in parallel in loops showing the growing number of buf_wait events in "show activity" without facing an instant stall like in the past. Lower values still cause quick stalls though. It's also apparent that some subsystems do not seem to detach from the buffer_wait lists when leaving. For example several crashes in the H1 part showed list elements still present after a free(), so maybe some operations performed inside h1_release() after the b_dequeue() call can sometimes result in a new allocation. Same for streams, where the dequeue is done relatively early.
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)