Mercurial > hg > nginx-site
annotate xml/ru/docs/ngx_core_module.xml @ 610:f71947553000
If "debug_connection" directive's parameter is specified using a hostname,
all resolved IPv4 addresses are now used, not only the first one.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Mon, 30 Jul 2012 13:13:32 +0000 |
parents | 764fbac1b8b4 |
children | 0526cac4637e |
rev | line source |
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222
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1 <?xml version="1.0"?> |
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2 |
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3 <!-- |
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4 Copyright (C) Igor Sysoev |
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5 Copyright (C) Nginx, Inc. |
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6 --> |
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7 |
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8 <!DOCTYPE module SYSTEM "../../../dtd/module.dtd"> |
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9 |
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10 <module name="Основная функциональность" |
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11 link="/ru/docs/ngx_core_module.html" |
589 | 12 lang="ru" |
13 rev="1"> | |
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14 |
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15 <section id="example" name="Пример конфигурации"> |
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16 |
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17 <para> |
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18 <example> |
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19 user www www; |
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20 worker_processes 2; |
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21 |
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22 error_log /var/log/nginx-error.log info; |
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23 |
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24 events { |
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25 use kqueue; |
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26 worker_connections 2048; |
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27 } |
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28 |
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29 ... |
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30 </example> |
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31 </para> |
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32 |
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33 </section> |
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34 |
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35 |
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36 <section id="directives" name="Директивы"> |
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37 |
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38 <directive name="accept_mutex"> |
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39 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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40 <default>on</default> |
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41 <context>events</context> |
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42 |
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43 <para> |
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44 Если <literal>accept_mutex</literal> включён, |
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45 рабочие процессы будут принимать новые соединения по очереди. |
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46 В противном случае о новых соединениях будет сообщаться сразу всем рабочим |
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47 процессам, и при низкой интенсивности поступления новых соединений |
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48 часть рабочих процессов может работать вхолостую. |
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49 <note> |
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50 Использование метода обработки соединений |
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51 <link doc="events.xml" id="rtsig"/> |
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52 требует обязательного включения <literal>accept_mutex</literal>. |
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53 </note> |
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54 </para> |
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55 |
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56 </directive> |
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57 |
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58 |
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59 <directive name="accept_mutex_delay"> |
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60 <syntax><value>время</value></syntax> |
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61 <default>500ms</default> |
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62 <context>events</context> |
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63 |
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64 <para> |
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65 При включённом <link id="accept_mutex"/> задаёт максимальное время, |
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66 в течение которого рабочий процесс вновь попытается начать принимать |
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67 новые соединения, если в настоящий момент этим уже занимается другой |
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68 рабочий процесс. |
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69 </para> |
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70 |
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71 </directive> |
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72 |
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73 |
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74 <directive name="daemon"> |
271 | 75 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
102
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76 <default>on</default> |
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77 <context>main</context> |
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78 |
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79 <para> |
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80 Определяет, будет ли nginx запускаться в режиме демона. |
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81 Используется в основном для разработки. |
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82 </para> |
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83 |
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84 </directive> |
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85 |
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86 |
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87 <directive name="debug_connection"> |
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88 <syntax> |
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89 <value>адрес</value> | |
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90 <value>CIDR</value> | |
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91 <literal>unix:</literal></syntax> |
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92 <default/> |
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93 <context>events</context> |
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94 |
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95 <para> |
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96 Включает отладочный лог для отдельных клиентских соединений. |
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97 Для остальных соединений используется уровень лога, заданный директивой |
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98 <link id="error_log"/>. |
523 | 99 Отлаживаемые соединения задаются IPv4 или IPv6 (1.3.0, 1.2.1) |
100 адресом или сетью. | |
516
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101 Соединение может быть также задано при помощи имени хоста, в этом случае |
610
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102 используются все IPv4-адреса, соответствующие имени. |
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103 <note> |
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104 До версии 1.3.4 в этом случае использовался только первый IPv4-адрес. |
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105 </note> |
523 | 106 Отладочный лог для соединений через UNIX-сокеты (1.3.0, 1.2.1) |
107 включается параметром “<literal>unix:</literal>”. | |
516
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108 <example> |
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109 events { |
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110 debug_connection 127.0.0.1; |
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111 debug_connection localhost; |
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112 debug_connection 192.0.2.0/24; |
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113 debug_connection ::1; |
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114 debug_connection 2001:0db8::/32; |
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115 debug_connection unix:; |
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116 ... |
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117 } |
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118 </example> |
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119 <note> |
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120 Для работы директивы необходимо сконфигурировать nginx с параметром |
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121 <literal>--with-debug</literal>. |
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122 </note> |
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123 </para> |
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124 |
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125 </directive> |
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126 |
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127 |
574 | 128 <directive name="debug_points"> |
129 <syntax><literal>abort</literal> | <literal>stop</literal></syntax> | |
130 <default/> | |
131 <context>main</context> | |
132 | |
133 <para> | |
134 Эта директива используется для отладки. | |
135 </para> | |
136 | |
137 <para> | |
138 В случае обнаружения внутренней ошибки, например, утечки сокетов в момент | |
139 перезапуска рабочих процессов, включение <literal>debug_points</literal> | |
140 приводит к созданию core-файла (<literal>abort</literal>) | |
141 или остановке процесса (<literal>stop</literal>) с целью последующей | |
142 диагностики с помощью системного отладчика. | |
143 </para> | |
144 | |
145 </directive> | |
146 | |
147 | |
255
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148 <directive name="error_log"> |
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149 <syntax> |
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150 <value>файл</value> | <literal>stderr</literal> |
271 | 151 [<literal>debug</literal> | |
152 <literal>info</literal> | | |
153 <literal>notice</literal> | | |
154 <literal>warn</literal> | | |
155 <literal>error</literal> | | |
156 <literal>crit</literal> | | |
157 <literal>alert</literal> | | |
158 <literal>emerg</literal>]</syntax> | |
255
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159 <default>logs/error.log error</default> |
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160 <context>main</context> |
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161 <context>http</context> |
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162 <context>server</context> |
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163 <context>location</context> |
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164 |
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165 <para> |
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166 Конфигурирует запись в лог. |
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167 </para> |
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168 |
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169 <para> |
271 | 170 Первый параметр задаёт файл, который будет хранить лог. |
255
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171 <!-- |
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172 Если имя файла не абсолютное, к нему добавляется в начало путь префикса. |
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173 --> |
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174 Специальное значение <literal>stderr</literal> выбирает стандартный файл ошибок. |
255
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175 </para> |
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176 |
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177 <para> |
271 | 178 Второй параметр определяет уровень лога. |
255
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179 Уровни лога, указанные выше, перечислены в порядке возрастания их серьёзности. |
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180 При установке определённого уровня в лог попадают все сообщения |
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181 указанного и более серьёзных уровней. |
271 | 182 Например, при стандартном уровне <literal>error</literal> в лог попадают |
183 сообщения уровней <literal>error</literal>, <literal>crit</literal>, | |
184 <literal>alert</literal> и <literal>emerg</literal>. | |
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185 Если этот параметр не задан, используется <literal>error</literal>. |
255
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186 <note> |
271 | 187 Для работы уровня лога <literal>debug</literal> необходимо сконфигурировать |
188 nginx с <literal>--with-debug</literal>. | |
255
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189 </note> |
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190 </para> |
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191 |
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192 </directive> |
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193 |
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194 |
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195 <directive name="env"> |
271 | 196 <syntax><value>переменная</value>[=<value>значение</value>]</syntax> |
102
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197 <default>TZ</default> |
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198 <context>main</context> |
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199 |
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200 <para> |
255
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201 Позволяет ограничить набор переменных окружения, поменять им значения |
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202 или же создать новые переменные окружения для следующих случаев: |
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203 <list type="bullet"> |
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204 |
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205 <listitem> |
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206 наследование переменных во время |
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207 <link doc="control.xml" id="upgrade">обновления исполняемого файла на лету</link>; |
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208 </listitem> |
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209 |
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210 <listitem> |
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211 использование переменных модулем |
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212 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link>; |
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213 </listitem> |
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214 |
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215 <listitem> |
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216 использование переменных рабочими процессами. |
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217 Однако нужно иметь в виду, что управление поведением системных библиотек |
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218 подобным образом возможно не всегда, поскольку зачастую библиотеки используют |
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219 переменные только во время инициализации, то есть ещё до того, как их |
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220 можно задать с помощью данной директивы. |
255
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221 Исключением из этого является вышеописанное |
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222 <link doc="control.xml" id="upgrade">обновление исполняемого файла на лету</link>. |
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223 </listitem> |
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224 |
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225 </list> |
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226 </para> |
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227 |
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228 <para> |
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229 Если переменная TZ не описана явно, то она всегда наследуется |
255
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230 и всегда доступна модулю |
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231 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link>. |
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232 </para> |
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233 |
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234 <para> |
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235 Пример использования: |
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236 <example> |
255
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237 env MALLOC_OPTIONS; |
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238 env PERL5LIB=/data/site/modules; |
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239 env OPENSSL_ALLOW_PROXY_CERTS=1; |
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240 </example> |
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241 </para> |
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242 |
444
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243 <para> |
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244 <note> |
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245 Переменная окружения NGINX используется для внутренних целей nginx |
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246 и не должна устанавливаться непосредственно самим пользователем. |
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247 </note> |
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248 </para> |
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249 |
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250 </directive> |
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251 |
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252 |
556
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253 <directive name="events"> |
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254 <syntax block="yes"/> |
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255 <default/> |
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256 <context>main</context> |
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257 |
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258 <para> |
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259 Предоставляет контекст конфигурационного файла, в котором указываются |
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260 директивы, влияющие на обработку соединений. |
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261 </para> |
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262 |
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263 </directive> |
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264 |
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265 |
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266 <directive name="include"> |
271 | 267 <syntax><value>файл</value> | <value>маска</value></syntax> |
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268 <default/> |
104
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269 <context/> |
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270 |
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271 <para> |
271 | 272 Включает в конфигурацию другой <value>файл</value> или файлы, |
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273 подходящие под заданную маску. |
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274 Включаемые файлы должны содержать синтаксически верные директивы и блоки. |
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275 </para> |
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276 |
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277 <para> |
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278 Пример использования: |
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279 <example> |
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280 include mime.types; |
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281 include vhosts/*.conf; |
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282 </example> |
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283 </para> |
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284 |
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285 </directive> |
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286 |
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287 |
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288 <directive name="lock_file"> |
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289 <syntax><value>файл</value></syntax> |
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290 <default>logs/nginx.lock</default> |
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291 <context>main</context> |
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292 |
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293 <para> |
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294 Для реализации <link id="accept_mutex"/> и сериализации доступа к |
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295 разделяемой памяти nginx использует механизм блокировок. |
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296 На большинстве систем блокировки реализованы с помощью атомарных |
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297 операций, и эта директива игнорируется. |
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298 Для остальных систем применяется механизм файлов блокировок. |
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299 Эта директива задаёт префикс имён файлов блокировок. |
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300 </para> |
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301 |
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302 </directive> |
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303 |
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304 |
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305 <directive name="master_process"> |
271 | 306 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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307 <default>on</default> |
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308 <context>main</context> |
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309 |
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310 <para> |
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311 Определяет, будут ли запускаться рабочие процессы. |
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312 Эта директива предназначена для разработчиков nginx. |
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313 </para> |
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314 |
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315 </directive> |
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316 |
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317 |
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318 <directive name="multi_accept"> |
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319 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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320 <default>off</default> |
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321 <context>events</context> |
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322 |
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323 <para> |
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324 Если <literal>multi_accept</literal> выключен, рабочий процесс |
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325 за один раз будет принимать только одно новое соединение. |
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326 В противном случае рабочий процесс |
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327 за один раз будет принимать сразу все новые соединения. |
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328 <note> |
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329 Директива игнорируется в случае использования метода обработки соединений |
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330 <link doc="events.xml" id="kqueue"/>, т.к. данный метод сам сообщает |
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331 число новых соединений, ожидающих приёма. |
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332 </note> |
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333 <note> |
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334 Использование метода обработки соединений |
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335 <link doc="events.xml" id="rtsig"/> |
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336 автоматически включает <literal>multi_accept</literal>. |
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337 </note> |
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338 </para> |
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339 |
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340 </directive> |
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341 |
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342 |
289
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343 <directive name="pcre_jit"> |
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344 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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345 <default>off</default> |
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346 <context>main</context> |
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347 <appeared-in>1.1.12</appeared-in> |
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348 |
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349 <para> |
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350 Разрешает или запрещает использование JIT-компиляции (PCRE JIT) |
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351 для регулярных выражений, известных на момент парсинга конфигурации. |
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352 </para> |
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353 |
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354 <para> |
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355 Использование PCRE JIT способно существенно ускорить обработку |
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356 регулярных выражений. |
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357 <note> |
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358 Для работы JIT необходима библиотека PCRE версии 8.20 или выше, |
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359 собранная с параметром конфигурации <literal>--enable-jit</literal>. |
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360 При сборке библиотеки PCRE вместе с nginx (<literal>--with-pcre=</literal>), |
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361 для включения поддержки JIT необходимо использовать параметр |
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362 конфигурации <literal>--with-pcre-jit</literal>. |
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363 </note> |
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364 </para> |
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365 |
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366 </directive> |
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367 |
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368 |
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369 <directive name="pid"> |
271 | 370 <syntax><value>файл</value></syntax> |
102
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371 <default>nginx.pid</default> |
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372 <context>main</context> |
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373 |
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374 <para> |
271 | 375 Задаёт <value>файл</value>, в котором будет храниться номер (PID) основного процесса. |
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376 </para> |
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377 |
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378 </directive> |
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379 |
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380 |
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381 <directive name="ssl_engine"> |
271 | 382 <syntax><value>устройство</value></syntax> |
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383 <default/> |
76
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384 <context>main</context> |
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385 |
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386 <para> |
255
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387 Задаёт название аппаратного SSL-акселератора. |
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388 </para> |
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389 |
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390 </directive> |
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391 |
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392 |
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393 <directive name="timer_resolution"> |
271 | 394 <syntax><value>интервал</value></syntax> |
99
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395 <default/> |
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396 <context>main</context> |
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397 |
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398 <para> |
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399 Уменьшает разрешение таймеров времени в рабочих процессах, за счёт |
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400 чего уменьшается число системных вызовов <c-func>gettimeofday</c-func>. |
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401 По умолчанию <c-func>gettimeofday</c-func> вызывается после каждой |
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402 операции получения событий из ядра. |
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403 C уменьшенным разрешением <c-func>gettimeofday</c-func> вызывается только |
271 | 404 один раз за указанный <value>интервал</value>. |
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405 </para> |
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406 |
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407 <para> |
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408 Пример использования: |
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409 <example> |
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410 timer_resolution 100ms; |
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411 </example> |
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412 </para> |
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413 |
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414 <para> |
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415 Внутренняя реализация интервала зависит от используемого метода: |
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416 <list type="bullet"> |
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417 |
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418 <listitem> |
271 | 419 фильтр <c-def>EVFILT_TIMER</c-def> при использовании <literal>kqueue</literal>; |
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420 </listitem> |
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421 |
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422 <listitem> |
271 | 423 <c-func>timer_create</c-func> при использовании <literal>eventport</literal>; |
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424 </listitem> |
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425 |
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426 <listitem> |
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427 и <c-func>setitimer</c-func> во всех остальных случаях. |
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428 </listitem> |
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429 |
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430 </list> |
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431 </para> |
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432 |
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433 </directive> |
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434 |
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435 |
556
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Documented the "events" and "use" directives.
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436 <directive name="use"> |
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437 <syntax><value>метод</value></syntax> |
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438 <default/> |
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439 <context>events</context> |
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440 |
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441 <para> |
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442 Задаёт <value>метод</value>, используемый для |
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443 <link doc="events.xml">обработки соединений</link>. |
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444 Обычно нет необходимости задавать его явно, поскольку по умолчанию |
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445 nginx сам выбирает наиболее эффективный метод. |
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446 </para> |
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447 |
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448 </directive> |
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449 |
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450 |
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451 <directive name="user"> |
271 | 452 <syntax><value>пользователь</value> [<value>группа</value>]</syntax> |
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453 <default>nobody nobody</default> |
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454 <context>main</context> |
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455 |
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456 <para> |
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457 Задаёт пользователя и группу, с правами которого будут работать |
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458 рабочие процессы. |
271 | 459 Если <value>группа</value> не задана, то используется группа, имя |
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460 которой совпадает с именем пользователя. |
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461 </para> |
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462 |
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463 </directive> |
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464 |
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465 |
545
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466 <directive name="worker_connections"> |
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467 <syntax><value>число</value></syntax> |
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468 <default>512</default> |
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469 <context>events</context> |
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470 |
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471 <para> |
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472 Задаёт максимальное число соединений, которое одновременно |
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473 может открыть рабочий процесс. |
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474 </para> |
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475 |
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476 <para> |
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477 Следует иметь в виду, что в это число входят все соединения |
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478 (в том числе, например, соединения с проксируемыми серверами), |
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479 а не только соединения с клиентами. |
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480 Стоит также учитывать, что фактическое число одновременных |
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481 соединений не может превышать действующего ограничения на |
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482 максимальное число открытых файлов, |
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483 см. <link id="worker_rlimit_nofile"/>. |
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484 </para> |
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485 |
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486 </directive> |
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487 |
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488 |
469
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Documented the "worker_cpu_affinity" directive.
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489 <directive name="worker_cpu_affinity"> |
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490 <syntax><value>маска_CPU</value> ...</syntax> |
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491 <default/> |
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492 <context>main</context> |
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493 |
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494 <para> |
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495 Привязывает рабочие процессы к группам процессоров. |
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496 Каждая группа процессоров задаётся битовой маской |
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497 разрешённых к использованию процессоров. |
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498 Для каждого рабочего процесса должна быть задана отдельная группа. |
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499 По умолчанию рабочие процессы не привязаны к конкретным процессорам. |
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500 </para> |
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|
501 |
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502 <para> |
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503 Например, |
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504 <example> |
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505 worker_processes 4; |
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506 worker_cpu_affinity 0001 0010 0100 1000; |
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507 </example> |
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508 привязывает каждый рабочий процесс к отдельному процессору, тогда как |
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509 <example> |
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510 worker_processes 2; |
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511 worker_cpu_affinity 0101 1010; |
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512 </example> |
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513 привязывает первый рабочий процесс к CPU0/CPU2, |
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514 а второй — к CPU1/CPU3. |
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|
515 Второй пример пригоден для hyper-threading. |
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516 </para> |
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|
517 |
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|
518 <para> |
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519 <note> |
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520 Директива доступна только на FreeBSD и Linux. |
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521 </note> |
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522 </para> |
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|
523 |
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|
524 </directive> |
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|
525 |
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|
526 |
255
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527 <directive name="worker_priority"> |
271 | 528 <syntax><value>число</value></syntax> |
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529 <default>0</default> |
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530 <context>main</context> |
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531 |
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532 <para> |
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533 Задаёт приоритет планирования рабочих процессов подобно тому, |
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534 как это делается командой <command>nice</command>: отрицательное |
271 | 535 <value>число</value> |
255
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536 означает более высокий приоритет. |
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537 Диапазон возможных значений, как правило, варьируется от -20 до 20. |
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538 </para> |
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539 |
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540 <para> |
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541 Пример использования: |
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542 <example> |
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543 worker_priority -10; |
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544 </example> |
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545 </para> |
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546 |
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547 </directive> |
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548 |
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549 |
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|
550 <directive name="worker_processes"> |
271 | 551 <syntax><value>число</value></syntax> |
255
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552 <default>1</default> |
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553 <context>main</context> |
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|
554 |
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|
555 <para> |
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556 Задаёт число рабочих процессов. |
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557 </para> |
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558 |
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559 <para> |
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560 Оптимальное значение зависит от множества факторов, включая |
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|
561 (но не ограничиваясь ими) число процессорных ядер, число |
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|
562 жёстких дисков с данными и картину нагрузок. |
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563 Если затрудняетесь в выборе правильного значения, можно начать |
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|
564 с установки его равным числу процессорных ядер. |
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|
565 </para> |
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|
566 |
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567 </directive> |
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|
568 |
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|
569 |
76
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Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
570 <directive name="worker_rlimit_core"> |
271 | 571 <syntax><value>размер</value></syntax> |
99
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|
572 <default/> |
76
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|
573 <context>main</context> |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
574 |
4a4caa566120
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parents:
diff
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|
575 <para> |
255
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576 Изменяет ограничение на наибольший размер core-файла |
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577 (<c-def>RLIMIT_CORE</c-def>) для рабочих процессов. |
76
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diff
changeset
|
578 Используется для увеличения ограничения без перезапуска основного процесса. |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
579 </para> |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
580 |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
581 </directive> |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
582 |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
583 |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
584 <directive name="worker_rlimit_nofile"> |
271 | 585 <syntax><value>число</value></syntax> |
99
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|
586 <default/> |
76
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changeset
|
587 <context>main</context> |
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Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
588 |
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Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
589 <para> |
255
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590 Изменяет ограничение на максимальное число открытых файлов |
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|
591 (<c-def>RLIMIT_NOFILE</c-def>) для рабочих процессов. |
76
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
592 Используется для увеличения ограничения без перезапуска основного процесса. |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
593 </para> |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
594 |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
595 </directive> |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
596 |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
597 |
554
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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|
598 <directive name="worker_rlimit_sigpending"> |
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parents:
545
diff
changeset
|
599 <syntax><value>число</value></syntax> |
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parents:
545
diff
changeset
|
600 <default/> |
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|
601 <context>main</context> |
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Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
602 |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
603 <para> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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parents:
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diff
changeset
|
604 На системах с поддержкой метода обработки соединений |
ccb7451af1d8
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Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
605 <link doc="events.xml" id="rtsig"/>, |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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changeset
|
606 изменяет ограничение на размер очереди сигналов |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
607 (<c-def>RLIMIT_SIGPENDING</c-def>) для рабочих процессов. |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
608 Используется для увеличения ограничения без перезапуска основного процесса. |
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parents:
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|
609 </para> |
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Ruslan Ermilov <ru@nginx.com>
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diff
changeset
|
610 |
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|
611 </directive> |
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changeset
|
612 |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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545
diff
changeset
|
613 |
76
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|
614 <directive name="working_directory"> |
271 | 615 <syntax><value>каталог</value></syntax> |
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616 <default/> |
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|
617 <context>main</context> |
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parents:
diff
changeset
|
618 |
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parents:
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changeset
|
619 <para> |
255
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620 Задаёт каталог, который будет текущим для рабочего процесса. |
76
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|
621 Основное применение — запись core-файла, в этом случае рабочий |
4a4caa566120
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
622 процесс должен иметь права на запись в этот каталог. |
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parents:
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|
623 </para> |
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parents:
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changeset
|
624 |
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parents:
diff
changeset
|
625 </directive> |
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parents:
diff
changeset
|
626 |
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parents:
diff
changeset
|
627 </section> |
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parents:
diff
changeset
|
628 |
4a4caa566120
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changeset
|
629 </module> |