d7696d11e1
Recent fix 2421c3769a ("BUG/MEDIUM: peers: don't fail twice to grab the
update lock") improved the situation a lot for peers under locking
contention but still not enough for situations with many peers and
many entries to expire fast. It's indeed still possible to trigger
warnings at end of injection sessions for 16 peers at 100k req/s each
doing 10 random track-sc when process_table_expire() runs and holds the
update lock if compiled with a high value of STKTABLE_MAX_UPDATES_AT_ONCE
(1000). Better just not insist in this case and postpone the update.
At this point, under load only ebmb_lookup() consumes CPU, other functions
are in the few percent, indicating reasonable contention, and peers remain
updated.
This should be backported to 3.2 after a bit of testing.
HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
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)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.