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view auto/types/sizeof @ 8125:cffaf3f2eec8
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 | e3faa5fb7772 |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. echo $ngx_n "checking for $ngx_type size ...$ngx_c" cat << END >> $NGX_AUTOCONF_ERR ---------------------------------------- checking for $ngx_type size END ngx_size= cat << END > $NGX_AUTOTEST.c #include <sys/types.h> #include <sys/time.h> $NGX_INCLUDE_UNISTD_H #include <signal.h> #include <stdio.h> #include <sys/resource.h> $NGX_INCLUDE_INTTYPES_H $NGX_INCLUDE_AUTO_CONFIG_H int main(void) { printf("%d", (int) sizeof($ngx_type)); return 0; } END ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS \ -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_LD_OPT $ngx_feature_libs" eval "$ngx_test >> $NGX_AUTOCONF_ERR 2>&1" if [ -x $NGX_AUTOTEST ]; then ngx_size=`$NGX_AUTOTEST` echo " $ngx_size bytes" fi case $ngx_size in 4) ngx_max_value=2147483647 ngx_max_len='(sizeof("-2147483648") - 1)' ;; 8) ngx_max_value=9223372036854775807LL ngx_max_len='(sizeof("-9223372036854775808") - 1)' ;; *) echo echo "$0: error: can not detect $ngx_type size" echo "----------" >> $NGX_AUTOCONF_ERR cat $NGX_AUTOTEST.c >> $NGX_AUTOCONF_ERR echo "----------" >> $NGX_AUTOCONF_ERR echo $ngx_test >> $NGX_AUTOCONF_ERR echo "----------" >> $NGX_AUTOCONF_ERR rm -rf $NGX_AUTOTEST* exit 1 esac rm -rf $NGX_AUTOTEST*