Mercurial > hg > nginx-quic
annotate auto/os/conf @ 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> |
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date | Thu, 08 Apr 2021 00:16:30 +0300 |
parents | e4c21e417277 |
children | 35afae4b3dff |
rev | line source |
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1 |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
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563 | 6 echo "checking for $NGX_SYSTEM specific features" |
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493 | 8 case "$NGX_PLATFORM" in |
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10 FreeBSD:*) |
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11 . auto/os/freebsd |
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12 ;; |
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14 Linux:*) |
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15 . auto/os/linux |
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16 ;; |
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18 SunOS:*) |
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19 . auto/os/solaris |
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20 ;; |
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22 Darwin:*) |
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23 . auto/os/darwin |
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24 ;; |
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25 |
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26 win32) |
455 | 27 . auto/os/win32 |
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28 ;; |
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29 |
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30 DragonFly:*) |
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31 have=NGX_FREEBSD . auto/have_headers |
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32 CORE_INCS="$UNIX_INCS" |
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33 CORE_DEPS="$UNIX_DEPS $FREEBSD_DEPS" |
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34 CORE_SRCS="$UNIX_SRCS $FREEBSD_SRCS" |
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35 |
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36 echo " + sendfile() found" |
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37 have=NGX_HAVE_SENDFILE . auto/have |
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38 CORE_SRCS="$CORE_SRCS $FREEBSD_SENDFILE_SRCS" |
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39 |
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40 ngx_spacer=' |
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41 ' |
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42 ;; |
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43 |
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44 NetBSD:*) |
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45 CORE_INCS="$UNIX_INCS" |
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46 CORE_DEPS="$UNIX_DEPS $POSIX_DEPS" |
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47 CORE_SRCS="$UNIX_SRCS" |
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48 |
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49 NGX_RPATH=YES |
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50 ;; |
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51 |
515 | 52 HP-UX:*) |
53 # HP/UX | |
54 have=NGX_HPUX . auto/have_headers | |
55 CORE_INCS="$UNIX_INCS" | |
56 CORE_DEPS="$UNIX_DEPS $POSIX_DEPS" | |
57 CORE_SRCS="$UNIX_SRCS" | |
58 CC_AUX_FLAGS="$CC_AUX_FLAGS -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1" | |
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59 CC_AUX_FLAGS="$CC_AUX_FLAGS -D_HPUX_ALT_XOPEN_SOCKET_API" |
515 | 60 ;; |
61 | |
62 OSF1:*) | |
517 | 63 # Tru64 UNIX |
515 | 64 have=NGX_TRU64 . auto/have_headers |
517 | 65 have=NGX_HAVE_STRERROR_R . auto/nohave |
515 | 66 CORE_INCS="$UNIX_INCS" |
67 CORE_DEPS="$UNIX_DEPS $POSIX_DEPS" | |
68 CORE_SRCS="$UNIX_SRCS" | |
69 ;; | |
70 | |
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71 GNU:*) |
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72 # GNU Hurd |
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73 have=NGX_GNU_HURD . auto/have_headers |
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74 CORE_INCS="$UNIX_INCS" |
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75 CORE_DEPS="$UNIX_DEPS $POSIX_DEPS" |
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76 CORE_SRCS="$UNIX_SRCS" |
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77 CC_AUX_FLAGS="$CC_AUX_FLAGS -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64" |
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78 ;; |
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79 |
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80 *) |
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81 CORE_INCS="$UNIX_INCS" |
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82 CORE_DEPS="$UNIX_DEPS $POSIX_DEPS" |
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83 CORE_SRCS="$UNIX_SRCS" |
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84 ;; |
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85 |
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86 esac |
455 | 87 |
88 | |
493 | 89 case "$NGX_MACHINE" in |
479 | 90 |
589 | 91 i386 | i686 | i86pc) |
509 | 92 have=NGX_HAVE_NONALIGNED . auto/have |
589 | 93 NGX_MACH_CACHE_LINE=32 |
94 ;; | |
95 | |
593 | 96 amd64 | x86_64) |
589 | 97 have=NGX_HAVE_NONALIGNED . auto/have |
98 NGX_MACH_CACHE_LINE=64 | |
509 | 99 ;; |
479 | 100 |
745 | 101 sun4u | sun4v | sparc | sparc64) |
581 | 102 have=NGX_ALIGNMENT value=16 . auto/define |
589 | 103 # TODO |
104 NGX_MACH_CACHE_LINE=64 | |
105 ;; | |
106 | |
107 ia64 ) | |
108 have=NGX_ALIGNMENT value=16 . auto/define | |
109 # TODO | |
110 NGX_MACH_CACHE_LINE=64 | |
111 ;; | |
112 | |
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113 aarch64 ) |
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114 have=NGX_ALIGNMENT value=16 . auto/define |
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115 NGX_MACH_CACHE_LINE=64 |
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116 ;; |
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117 |
589 | 118 *) |
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119 have=NGX_ALIGNMENT value=16 . auto/define |
589 | 120 NGX_MACH_CACHE_LINE=32 |
581 | 121 ;; |
122 | |
479 | 123 esac |
589 | 124 |
125 if test -z "$NGX_CPU_CACHE_LINE"; then | |
126 NGX_CPU_CACHE_LINE=$NGX_MACH_CACHE_LINE | |
127 fi | |
128 | |
129 have=NGX_CPU_CACHE_LINE value=$NGX_CPU_CACHE_LINE . auto/define |