annotate xml/ru/docs/http/ngx_http_log_module.xml @ 351:a4fa80755eab

Consistently strip initial offset in examples.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 24 Jan 2012 11:01:22 +0000
parents 457c54242cfa
children bb51d3e17dd0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 <?xml version="1.0"?>
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2
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3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Модуль ngx_http_log_module"
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6 link="/ru/docs/http/ngx_http_log_module.html"
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7 lang="ru">
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8
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9 <section id="summary">
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10
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11 <para>
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12 Модуль <literal>ngx_http_log_module</literal> записывает логи запросов
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13 в указанном формате.
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14 </para>
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15
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16 </section>
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17
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18
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19 <section id="example" name="Пример конфигурации">
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20
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21 <para>
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22 <example>
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23 log_format gzip '$remote_addr - $remote_user [$time_local] '
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24 '"$request" $status $bytes_sent '
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25 '"$http_referer" "$http_user_agent" "$gzip_ratio"';
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26
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27 access_log /spool/logs/nginx-access.log gzip buffer=32k;
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28 </example>
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29 </para>
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30
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31 </section>
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32
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33
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34 <section id="directives" name="Директивы">
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35
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36 <directive name="access_log">
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37 <syntax>
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38 <value>путь</value>
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39 [<value>формат</value>
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40 [<literal>buffer</literal>=<value>размер</value>]]</syntax>
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41 <syntax><literal>off</literal></syntax>
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42 <default>log/access.log combined</default>
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43 <context>http</context>
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44 <context>server</context>
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45 <context>location</context>
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46 <context>if в location</context>
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47 <context>limit_except</context>
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48
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49 <para>
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50 Задаёт путь, формат и размер буфера для буферизованной записи в лог.
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51 На одном уровне может использоваться несколько логов.
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52 Специальное значение <literal>off</literal> отменяет все директивы
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53 <literal>access_log</literal> для текущего уровня.
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54 Если формат не указан, то используется предопределённый формат
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55 “<literal>combined</literal>”.
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56 </para>
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57
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58 <para>
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59 Размер буфера должен быть не больше размера атомарной записи в дисковый файл.
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60 Для FreeBSD 3.0-6.0 этот размер неограничен.
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61 </para>
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62
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63 <para>
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64 В пути файла можно использовать переменные (0.7.6+),
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65 но такие логи имеют некоторые ограничения:
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66 <list type="bullet">
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67
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68 <listitem>
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69 <link doc="../ngx_core_module.xml" id="user">пользователь</link>,
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70 с правами которого работают рабочие процессы, должен
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71 иметь права на создание файлов в каталоге с такими логами;
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72 </listitem>
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73
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74 <listitem>
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75 не работает буферизация;
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76 </listitem>
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78 <listitem>
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79 файл открывается для каждой записи в лог и сразу же после записи закрывается.
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80 Следует однако иметь в виду, что поскольку дескрипторы часто используемых файлов
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81 могут храниться в <link id="open_log_file_cache">кэше</link>,
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82 то при вращении логов в течение времени, заданного параметром
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83 <literal>valid</literal> директивы <link id="open_log_file_cache"/>,
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84 запись может продолжаться в старый файл.
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85 </listitem>
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86
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87 <listitem>
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88 при каждой записи в лог проверяется существование
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89 <link doc="ngx_http_core_module.xml" id="root">корневого каталога</link>
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90 для запроса — если этот каталог не существует, то лог не создаётся.
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56457a474903 If text of the link is not provided, the @id is used.
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91 Поэтому <link doc="ngx_http_core_module.xml" id="root"/>
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92 и <literal>access_log</literal> нужно описывать на одном уровне:
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93 <example>
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94 server {
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95 root /spool/vhost/data/$host;
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96 access_log /spool/vhost/logs/$host;
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97 ...
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98 </example>
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99 </listitem>
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100
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101 </list>
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102 </para>
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103
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104 </directive>
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105
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106
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107 <directive name="log_format">
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108 <syntax>
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109 <value>название</value>
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110 <value>строка</value> ...</syntax>
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111 <default>combined "..."</default>
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112 <context>http</context>
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113
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114 <para>
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115 Задаёт формат лога.
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116 </para>
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117
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118 <para>
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119 Кроме общих переменных в формате можно использовать переменные,
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120 существующие только на момент записи в лог:
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121 <list type="tag">
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122
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123 <tag-name><var>$body_bytes_sent</var></tag-name>
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124 <tag-desc>
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125 число байт, переданных клиенту, за вычетом заголовка ответа;
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126 переменная совместима с параметром “<literal>%B</literal>” модуля Apache
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127 <literal>mod_log_config</literal>
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128 </tag-desc>
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129
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130 <tag-name><var>$bytes_sent</var></tag-name>
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131 <tag-desc>
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132 число байт, переданных клиенту
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133 </tag-desc>
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134
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135 <tag-name><var>$connection</var></tag-name>
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136 <tag-desc>
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137 порядковый номер соединения
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138 </tag-desc>
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139
224
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140 <tag-name><var>$msec</var></tag-name>
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141 <tag-desc>
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142 время в секундах с точностью до миллисекунд на момент записи в лог
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143 </tag-desc>
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144
224
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145 <tag-name><var>$pipe</var></tag-name>
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146 <tag-desc>
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147 “<literal>p</literal>” если запрос был pipelined, иначе “<literal>.</literal>”
224
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148 </tag-desc>
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149
224
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150 <tag-name><var>$request_length</var></tag-name>
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151 <tag-desc>
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152 длина запроса (включая строку запроса, заголовок и тело запроса)
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153 </tag-desc>
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154
224
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155 <tag-name><var>$request_time</var></tag-name>
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156 <tag-desc>
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157 время обработки запроса в секундах с точностью до миллисекунд;
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158 время, прошедшее с момента чтения первых байт от клиента до
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159 момента отправки последних байт клиенту и записи в лог
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160 </tag-desc>
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161
224
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162 <tag-name><var>$status</var></tag-name>
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163 <tag-desc>
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164 статус ответа
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165 </tag-desc>
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166
224
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167 <tag-name><var>$time_iso8601</var></tag-name>
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168 <tag-desc>
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169 локальное время в формате по стандарту ISO 8601
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170 </tag-desc>
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171
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172 <tag-name><var>$time_local</var></tag-name>
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173 <tag-desc>
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174 локальное время в Common Log Format
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175 </tag-desc>
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176
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177 </list>
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178 </para>
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179
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180 <para>
224
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181 Строки заголовка, переданные клиенту, начинаются с префикса
271
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182 “<literal>sent_http_</literal>”, например,
224
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183 <var>$sent_http_content_range</var>.
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184 </para>
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185
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186 <para>
224
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187 В конфигурации всегда существует предопределённый формат
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188 “<literal>combined</literal>”:
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189 <example>
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190 log_format combined '$remote_addr - $remote_user [$time_local] '
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191 '"$request" $status $body_bytes_sent '
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192 '"$http_referer" "$http_user_agent"';
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193 </example>
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194 </para>
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195
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196 </directive>
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197
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198 <directive name="open_log_file_cache">
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199
224
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200 <syntax>
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201 <literal>max</literal>=<value>N</value>
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202 [<literal>inactive</literal>=<value>время</value>]
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203 [<literal>min_uses</literal>=<value>N</value>]
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204 [<literal>valid</literal>=<value>время</value>]</syntax>
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205 <syntax><literal>off</literal></syntax>
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206 <default>off</default>
224
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207 <context>http</context>
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208 <context>server</context>
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209 <context>location</context>
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210
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211 <para>
224
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212 Задаёт кэш, в котором хранятся дескрипторы файлов часто используемых
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213 логов, имена которых заданы с использованием переменных.
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214 Параметры директивы:
224
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215 <list type="tag">
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216
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217 <tag-name><literal>max</literal></tag-name>
224
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218 <tag-desc>
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219 задаёт максимальное число дескрипторов в кэше;
274
457c54242cfa Stole translation of LRU from ngx_http_proxy_module.
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220 при переполнении кэша самые невостребованные (LRU)
224
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221 дескрипторы закрываются
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222 </tag-desc>
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223
271
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224 <tag-name><literal>inactive</literal></tag-name>
224
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225 <tag-desc>
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226 задаёт время, после которого закэшированный дескриптор закрывается,
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227 если к нему не было обращений в течение этого времени;
224
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228 по умолчанию 10 секунд
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229 </tag-desc>
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230
271
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231 <tag-name><literal>min_uses</literal></tag-name>
224
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232 <tag-desc>
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233 задаёт минимальное число использований файла в течение
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234 времени, заданного параметром <literal>inactive</literal>,
224
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235 после которого дескриптор файла будет оставаться открытым в кэше;
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236 по умолчанию 1
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237 </tag-desc>
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238
271
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239 <tag-name><literal>valid</literal></tag-name>
224
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240 <tag-desc>
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241 задаёт, через какое время нужно проверять, что файл ещё
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242 существует под тем же именем;
224
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243 по умолчанию 60 секунд
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244 </tag-desc>
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245
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246 <tag-name><literal>off</literal></tag-name>
224
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247 <tag-desc>
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248 запрещает кэш
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249 </tag-desc>
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250
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251 </list>
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252 </para>
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253
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254 <para>
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255 Пример использования:
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256 <example>
224
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257 open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2;
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258 </example>
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259 </para>
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260
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261 </directive>
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262
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263 </section>
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264
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265 </module>