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Lingering close for connections with pipelined requests.
This is expected to help with clients using pipelining with some constant
depth, such as apt[1][2].
When downloading many resources, apt uses pipelining with some constant
depth, a number of requests in flight. This essentially means that after
receiving a response it sends an additional request to the server, and
this can result in requests arriving to the server at any time. Further,
additional requests are sent one-by-one, and can be easily seen as such
(neither as pipelined, nor followed by pipelined requests).
The only safe approach to close such connections (for example, when
keepalive_requests is reached) is with lingering. To do so, now nginx
monitors if pipelining was used on the connection, and if it was, closes
the connection with lingering.
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=973861#10
[2] https://mailman.nginx.org/pipermail/nginx-devel/2023-January/ZA2SP5SJU55LHEBCJMFDB2AZVELRLTHI.html
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 02 Feb 2023 23:38:48 +0300 |
parents | 1bdf906bba99 |
children |
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geo2nginx.pl by Andrei Nigmatulin The perl script to convert CSV geoip database ( free download at http://www.maxmind.com/app/geoip_country ) to format, suitable for use by the ngx_http_geo_module. unicode2nginx by Maxim Dounin The perl script to convert unicode mappings ( available at http://www.unicode.org/Public/MAPPINGS/ ) to the nginx configuration file format. Two generated full maps for windows-1251 and koi8-r. vim by Evan Miller Syntax highlighting of nginx configuration for vim, to be placed into ~/.vim/.