view auto/cc/owc @ 8398:82e174e47663

Changed keepalive_requests default to 1000 (ticket #2155). It turns out no browsers implement HTTP/2 GOAWAY handling properly, and large enough number of resources on a page results in failures to load some resources. In particular, Chrome seems to experience errors if loading of all resources requires more than 1 connection (while it is usually able to retry requests at least once, even with 2 connections there are occasional failures for some reason), Safari if loading requires more than 3 connections, and Firefox if loading requires more than 10 connections (can be configured with network.http.request.max-attempts, defaults to 10). It does not seem to be possible to resolve this on nginx side, even strict limiting of maximum concurrency does not help, and loading issues seems to be triggered by merely queueing of a request for a particular connection. The only available mitigation seems to use higher keepalive_requests value. The new default is 1000 and matches previously used default for http2_max_requests. It is expected to be enough for 99.98% of the pages (https://httparchive.org/reports/state-of-the-web?start=latest#reqTotal) even in Chrome.
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 08 Apr 2021 00:16:30 +0300
parents b7b7f3a0cc28
children
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# Open Watcom C 1.0, 1.2, 1.3

# optimizations

# maximize speed
CFLAGS="$CFLAGS -ot"
# reorder instructions for best pipeline usage
CFLAGS="$CFLAGS -op"
# inline intrinsic functions
CFLAGS="$CFLAGS -oi"
# inline expansion
CFLAGS="$CFLAGS -oe"
# disable stack checking calls
CFLAGS="$CFLAGS -s"

case $CPU in
    pentium)
        # optimize for Pentium and Athlon
        # register-based arguments passing conventions
        CPU_OPT="-5r"
        # stack-based arguments passing conventions
        #CPU_OPT="-5s"
    ;;

    pentiumpro)
        # optimize for Pentium Pro, Pentium II and Pentium III
        # register-based arguments passing conventions
        CPU_OPT="-6r"
        # stack-based arguments passing conventions
        #CPU_OPT="-6s"
    ;;
esac

CFLAGS="$CFLAGS $CPU_OPT"


# warnings

# maximum level
CFLAGS="$CFLAGS -wx"
#CFLAGS="$CFLAGS -w3"

# stop on warning
CFLAGS="$CFLAGS -we"

# built target is NT
CFLAGS="$CFLAGS -bt=nt"

# multithreaded
CFLAGS="$CFLAGS -bm"

# debug
CFLAGS="$CFLAGS -d2"

# quiet
CFLAGS="$CFLAGS -zq"

# Open Watcom C 1.2
have=NGX_HAVE_C99_VARIADIC_MACROS . auto/have


# the precompiled headers
#CORE_DEPS="$CORE_DEPS $NGX_OBJS/ngx_config.pch"
#NGX_PCH="$NGX_OBJS/ngx_config.pch"
#NGX_BUILD_PCH="-fhq=$NGX_OBJS/ngx_config.pch"
#NGX_USE_PCH="-fh=$NGX_OBJS/ngx_config.pch"


# the link flags, built target is NT GUI mode application
#CORE_LINK="$CORE_LINK -l=nt_win"


# the resource file
NGX_RCC="wrc \$(CORE_INCS) -fo=$NGX_OBJS/nginx.res "
NGX_RCC="$NGX_RCC $NGX_WIN32_RC $NGX_OBJS/nginx.exe"


ngx_include_opt="-i="
ngx_objout="-fo"
ngx_binout="-fe="
ngx_objext="obj"

ngx_regex_dirsep='\\'
ngx_dirsep="\\"

ngx_long_start=' '
ngx_long_end=' '
ngx_long_regex_cont=' \&\
	'
ngx_long_cont=' &
	'

ngx_regex_cont=' \&\
	'
ngx_cont=' &
	'
ngx_tab=' &
		'