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HAProxy - Load balancer
21006 commits 26 branches 410 tags 317 MiB
C 98.1%
Shell 0.9%
Makefile 0.5%
Lua 0.2%
Python 0.1%
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Willy Tarreau a57f2a5cfe BUG/MEDIUM: pool: try once to allocate from another bucket if empty 
In order to limit inter-thread contention on the global pool, in 2.9-dev3
with commit 7bf829ace ("MAJOR: pools: move the shared pool's free_list
over multiple buckets"), it was decided that if the selected bucket had
an empty free list, we would simply give up and fall back to the OS
allocator.

But this causes allocations to be made from the OS for certain threads,
to be released to overloaded pools that are sent back to the OS. One
visible effect is that sending a lot of traffic using h2load with 100
parallel streams over 100 connections causes 5-10k buffers to be
allocated, then reducing the load to only 10 connections doesn't make
these allocations go down, just because some buckets are no longer
visited.

Tests show that giving a second chance to pick another bucket in this
case is sufficient to visit all other buckets and recycle their pending
objects. Now "show pools" that starts at 10k buffers at 100 connections
goes down to about 150 with 1 connection and 100 streams in a fraction
of a second.

No backport is needed, as the issue is only in 2.9.
2023-11-08 17:14:03 +01:00
.github CI: github: update wolfSSL to 5.6.4 2023-11-03 18:50:45 +01:00
addons MEDIUM: tree-wide: logsrv struct becomes logger 2023-10-13 10:05:06 +02:00
admin MEDIUM: systemd: be more verbose about the reload 2023-10-31 18:59:29 +01:00
dev DEV: sslkeylogger: handle file opening error 2023-10-03 15:23:35 +02:00
doc [RELEASE] Released version 2.9-dev9 2023-11-04 09:38:16 +01:00
examples EXAMPLES: maintain haproxy 2.8 retrocompatibility for lua mailers script 2023-07-11 16:04:22 +02:00
include BUG/MEDIUM: pool: fix releasable pool calculation when overloaded 2023-11-08 17:12:49 +01:00
reg-tests MINOR: connection: Send out generic, user-defined server TLVs 2023-11-04 04:56:59 +01:00
scripts CI: ssl: add git id support for wolfssl download 2023-10-10 10:34:17 +02:00
src BUG/MEDIUM: pool: try once to allocate from another bucket if empty 2023-11-08 17:14:03 +01:00
tests Revert "MAJOR: import: update mt_list to support exponential back-off" 2023-09-15 17:13:43 +02:00
.cirrus.yml CI: cirrus-ci: display gdb bt if any 2023-09-22 08:28:30 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore CONTRIB: Add vi file extensions to .gitignore 2023-06-02 18:14:34 +02:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml CI: travis-ci: temporarily disable arm64 builds 2021-08-07 07:28:15 +02:00
BRANCHES DOC: fix some spelling issues over multiple files 2021-01-08 14:53:47 +01:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 2.9-dev9 2023-11-04 09:38:16 +01:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2021-08-16 12:37:59 +02:00
INSTALL DOC: install: update the wolfSSL required version 2023-11-03 19:02:23 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS CLEANUP: assorted typo fixes in the code and comments 2022-11-30 14:02:36 +01:00
Makefile BUILD: ssl: Build with new cryptographic library AWS-LC 2023-09-04 18:19:18 +02:00
README DOC: create a BRANCHES file to explain the life cycle 2019-06-15 22:00:14 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 2.9-dev9 2023-11-04 09:38:16 +01:00
VERSION [RELEASE] Released version 2.9-dev9 2023-11-04 09:38:16 +01:00

README 

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)