Mercurial > hg > nginx-site
annotate xml/en/docs/ngx_core_module.xml @ 1462:e69e4dbcc760
Documented OSS stream modules.
author | Vladimir Homutov <vl@nginx.com> |
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date | Tue, 21 Apr 2015 13:47:00 +0300 |
parents | f5b5eefc43cb |
children | eea7541e7c6a |
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1 <?xml version="1.0"?> |
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2 |
580
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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 |
63
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8 <!DOCTYPE module SYSTEM "../../../dtd/module.dtd"> |
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9 |
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10 <module name="Core functionality" |
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11 link="/en/docs/ngx_core_module.html" |
589 | 12 lang="en" |
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13 rev="13"> |
63
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14 |
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15 <section id="example" name="Example Configuration"> |
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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="Directives"> |
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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 If <literal>accept_mutex</literal> is enabled, |
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45 worker processes will accept new connections by turn. |
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46 Otherwise, all worker processes will be notified about new connections, |
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47 and if volume of new connections is low, some of the worker processes |
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48 may just waste system resources. |
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49 <note> |
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50 The use of <link doc="events.xml" id="rtsig"/> |
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51 connection processing method |
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52 requires <literal>accept_mutex</literal> to be enabled. |
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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>time</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 If <link id="accept_mutex"/> is enabled, specifies the maximum time |
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66 during which a worker process will try to restart accepting new |
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67 connections if another worker process is currently accepting |
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68 new connections. |
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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 Determines whether nginx should become a daemon. |
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81 Mainly used during development. |
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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>address</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 Enables debugging log for selected client connections. |
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97 Other connections will use logging level set by the |
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98 <link id="error_log"/> directive. |
523 | 99 Debugged connections are specified by IPv4 or IPv6 (1.3.0, 1.2.1) |
100 address or network. | |
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101 A connection may also be specified using a hostname. |
523 | 102 For connections using UNIX-domain sockets (1.3.0, 1.2.1), |
103 debugging log is enabled by the “<literal>unix:</literal>” parameter. | |
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104 <example> |
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105 events { |
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106 debug_connection 127.0.0.1; |
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107 debug_connection localhost; |
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108 debug_connection 192.0.2.0/24; |
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109 debug_connection ::1; |
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110 debug_connection 2001:0db8::/32; |
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111 debug_connection unix:; |
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112 ... |
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113 } |
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114 </example> |
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115 <note> |
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116 For this directive to work, nginx needs to |
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117 be built with <literal>--with-debug</literal>, |
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118 see “<link doc="debugging_log.xml"/>”. |
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119 </note> |
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120 </para> |
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121 |
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122 </directive> |
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123 |
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124 |
574 | 125 <directive name="debug_points"> |
126 <syntax><literal>abort</literal> | <literal>stop</literal></syntax> | |
127 <default/> | |
128 <context>main</context> | |
129 | |
130 <para> | |
131 This directive is used for debugging. | |
132 </para> | |
133 | |
134 <para> | |
135 When internal error is detected, e.g. the leak of sockets on | |
136 restart of working processes, enabling <literal>debug_points</literal> | |
137 leads to a core file creation (<literal>abort</literal>) | |
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138 or to stopping of a process (<literal>stop</literal>) for further |
574 | 139 analysis using a system debugger. |
140 </para> | |
141 | |
142 </directive> | |
143 | |
144 | |
158
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145 <directive name="error_log"> |
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146 <syntax> |
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147 <value>file</value> | <literal>stderr</literal> | |
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148 <literal>syslog:</literal><literal>server</literal>=<value>address</value>[,<value>parameter</value>=<value>value</value>] | |
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149 <literal>memory:</literal><value>size</value> |
271 | 150 [<literal>debug</literal> | |
151 <literal>info</literal> | | |
152 <literal>notice</literal> | | |
153 <literal>warn</literal> | | |
154 <literal>error</literal> | | |
155 <literal>crit</literal> | | |
156 <literal>alert</literal> | | |
157 <literal>emerg</literal>]</syntax> | |
158
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158 <default>logs/error.log error</default> |
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159 <context>main</context> |
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160 <context>http</context> |
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161 <context>stream</context> |
158
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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 Configures logging. |
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167 Several logs can be specified on the same level (1.5.2). |
158
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168 </para> |
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169 |
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170 <para> |
271 | 171 The first parameter defines a file that will store the log. |
158
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172 <!-- |
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173 If filename is not absolute, it is prefixed with the prefix path. |
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174 --> |
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175 The special value <literal>stderr</literal> selects the standard error file. |
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176 Logging to <link doc="syslog.xml">syslog</link> can be configured by specifying |
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177 the “<literal>syslog:</literal>” prefix. |
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178 Logging to a |
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179 <link doc="debugging_log.xml" id="memory">cyclic memory buffer</link> |
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180 can be configured by specifying the “<literal>memory:</literal>” prefix and |
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181 buffer <value>size</value>, and is generally used for debugging (1.7.11). |
158
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182 </para> |
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183 |
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184 <para> |
271 | 185 The second parameter determines the level of logging. |
158
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186 Log levels above are listed in the order of increasing severity. |
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187 Setting a certain log level will cause all messages of |
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188 the specified and more severe log levels to be logged. |
271 | 189 For example, the default level <literal>error</literal> will |
190 cause <literal>error</literal>, <literal>crit</literal>, | |
191 <literal>alert</literal>, and <literal>emerg</literal> messages | |
158
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192 to be logged. |
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193 If this parameter is omitted then <literal>error</literal> is used. |
158
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194 <note> |
271 | 195 For <literal>debug</literal> logging to work, nginx needs to |
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196 be built with <literal>--with-debug</literal>, |
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197 see “<link doc="debugging_log.xml"/>”. |
158
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198 </note> |
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199 |
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200 <note> |
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201 The directive can be specified on the |
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202 <literal>stream</literal> level |
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203 starting from version 1.7.11. |
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204 </note> |
158
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205 </para> |
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206 |
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207 </directive> |
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208 |
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209 |
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210 <directive name="env"> |
271 | 211 <syntax><value>variable</value>[=<value>value</value>]</syntax> |
102
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212 <default>TZ</default> |
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213 <context>main</context> |
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214 |
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215 <para> |
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216 By default, nginx removes all environment variables inherited |
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217 from its parent process except the TZ variable. |
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218 This directive allows preserving some of the inherited variables, |
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219 changing their values, or creating new environment variables. |
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220 These variables are then: |
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221 <list type="bullet"> |
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222 |
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223 <listitem> |
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224 inherited during a <link doc="control.xml" id="upgrade">live upgrade</link> |
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225 of an executable file; |
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226 </listitem> |
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227 |
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228 <listitem> |
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229 used by the |
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230 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link> module; |
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231 </listitem> |
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232 |
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233 <listitem> |
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234 used by worker processes. |
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235 One should bear in mind that controlling system libraries in this way |
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236 is not always possible as it is common for libraries to check |
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237 variables only during initialization, well before they can be set |
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238 using this directive. |
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239 An exception from this is an above mentioned |
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240 <link doc="control.xml" id="upgrade">live upgrade</link> |
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241 of an executable file. |
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242 </listitem> |
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243 |
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244 </list> |
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245 </para> |
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246 |
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247 <para> |
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248 The TZ variable is always inherited and available to the |
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249 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link> |
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250 module, unless it is configured explicitly. |
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251 </para> |
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252 |
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253 <para> |
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254 Usage example: |
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255 <example> |
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256 env MALLOC_OPTIONS; |
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257 env PERL5LIB=/data/site/modules; |
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258 env OPENSSL_ALLOW_PROXY_CERTS=1; |
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259 </example> |
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260 </para> |
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261 |
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262 <para> |
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263 <note> |
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264 The NGINX environment variable is used internally by nginx |
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265 and should not be set directly by the user. |
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266 </note> |
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267 </para> |
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268 |
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269 </directive> |
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270 |
249 | 271 |
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272 <directive name="events"> |
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273 <syntax block="yes"/> |
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274 <default/> |
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275 <context>main</context> |
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276 |
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277 <para> |
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278 Provides the configuration file context in which the directives that |
556
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279 affect connection processing are specified. |
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280 </para> |
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281 |
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282 </directive> |
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283 |
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284 |
63
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285 <directive name="include"> |
271 | 286 <syntax><value>file</value> | <value>mask</value></syntax> |
63
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287 <default/> |
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288 <context/> |
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289 |
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290 <para> |
271 | 291 Includes another <value>file</value>, or files matching the |
292 specified <value>mask</value>, into configuration. | |
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293 Included files should consist of |
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294 syntactically correct directives and blocks. |
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295 </para> |
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296 |
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297 <para> |
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298 Usage example: |
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299 <example> |
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300 include mime.types; |
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301 include vhosts/*.conf; |
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302 </example> |
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303 </para> |
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304 |
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305 </directive> |
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306 |
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307 |
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308 <directive name="lock_file"> |
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309 <syntax><value>file</value></syntax> |
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310 <default>logs/nginx.lock</default> |
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311 <context>main</context> |
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312 |
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313 <para> |
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314 nginx uses the locking mechanism to implement <link id="accept_mutex"/> |
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315 and serialize access to shared memory. |
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316 On most systems the locks are implemented using atomic operations, |
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317 and this directive is ignored. |
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318 On other systems the “lock file” mechanism is used. |
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319 This directive specifies a prefix for the names of lock files. |
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320 </para> |
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321 |
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322 </directive> |
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323 |
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324 |
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325 <directive name="master_process"> |
271 | 326 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
102
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327 <default>on</default> |
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328 <context>main</context> |
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329 |
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330 <para> |
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331 Determines whether worker processes are started. |
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332 This directive is intended for nginx developers. |
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333 </para> |
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334 |
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335 </directive> |
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336 |
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337 |
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338 <directive name="multi_accept"> |
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339 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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340 <default>off</default> |
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341 <context>events</context> |
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342 |
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343 <para> |
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344 If <literal>multi_accept</literal> is disabled, a worker process |
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345 will accept one new connection at a time. |
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346 Otherwise, a worker process |
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347 will accept all new connections at a time. |
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348 <note> |
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349 The directive is ignored if <link doc="events.xml" id="kqueue"/> |
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350 connection processing method is used, because it reports |
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351 the number of new connections waiting to be accepted. |
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352 </note> |
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353 <note> |
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354 The use of <link doc="events.xml" id="rtsig"/> |
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355 connection processing method |
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356 automatically enables <literal>multi_accept</literal>. |
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357 </note> |
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358 </para> |
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359 |
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360 </directive> |
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361 |
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362 |
289
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363 <directive name="pcre_jit"> |
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364 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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365 <default>off</default> |
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366 <context>main</context> |
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367 <appeared-in>1.1.12</appeared-in> |
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368 |
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369 <para> |
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370 Enables or disables the use of “just-in-time compilation” (PCRE JIT) |
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371 for the regular expressions known by the time of configuration parsing. |
289
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372 </para> |
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373 |
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374 <para> |
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375 PCRE JIT can speed up processing of regular expressions significantly. |
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376 <note> |
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377 The JIT is available in PCRE libraries starting from version 8.20 |
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378 built with the <literal>--enable-jit</literal> configuration parameter. |
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379 When the PCRE library is built with nginx (<literal>--with-pcre=</literal>), |
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380 the JIT support is enabled via the |
289
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381 <literal>--with-pcre-jit</literal> configuration parameter. |
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382 </note> |
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383 </para> |
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384 |
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385 </directive> |
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386 |
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387 |
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388 <directive name="pid"> |
271 | 389 <syntax><value>file</value></syntax> |
102
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390 <default>nginx.pid</default> |
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391 <context>main</context> |
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392 |
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393 <para> |
271 | 394 Defines a <value>file</value> that will store the process ID of the main process. |
63
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395 </para> |
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396 |
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397 </directive> |
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398 |
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399 |
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400 <directive name="ssl_engine"> |
271 | 401 <syntax><value>device</value></syntax> |
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402 <default/> |
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403 <context>main</context> |
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404 |
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405 <para> |
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406 Defines the name of the hardware SSL accelerator. |
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407 </para> |
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408 |
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409 </directive> |
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410 |
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411 |
1436 | 412 <directive name="thread_pool"> |
413 <syntax> | |
414 <value>name</value> | |
415 <literal>threads</literal>=<value>number</value> | |
416 [<literal>max_queue</literal>=<value>number</value>]</syntax> | |
417 <default>default threads=32 max_queue=65536</default> | |
418 <context>main</context> | |
419 <appeared-in>1.7.11</appeared-in> | |
420 | |
421 <para> | |
422 Defines named thread pools | |
423 used for multi-threaded reading and sending of files | |
424 <link doc="http/ngx_http_core_module.xml" id="aio">without blocking</link> | |
425 worker processes. | |
426 </para> | |
427 | |
428 <para> | |
429 The <literal>threads</literal> parameter | |
430 defines the number of threads in the pool. | |
431 </para> | |
432 | |
433 <para> | |
434 In the event that all threads in the pool are busy, | |
435 a new task will wait in the queue. | |
436 The <literal>max_queue</literal> parameter limits the number | |
437 of tasks allowed to be waiting in the queue. | |
438 By default, up to 65536 tasks can wait in the queue. | |
439 When the queue overflows, the task is completed with an error. | |
440 </para> | |
441 | |
442 </directive> | |
443 | |
444 | |
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445 <directive name="timer_resolution"> |
271 | 446 <syntax><value>interval</value></syntax> |
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447 <default/> |
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448 <context>main</context> |
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449 |
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450 <para> |
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451 Reduces timer resolution in worker processes, thus reducing the |
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452 number of <c-func>gettimeofday</c-func> system calls made. |
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453 By default, <c-func>gettimeofday</c-func> is called each time |
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454 a kernel event is received. |
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455 With reduced resolution, <c-func>gettimeofday</c-func> is only |
271 | 456 called once per specified <value>interval</value>. |
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457 </para> |
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458 |
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459 <para> |
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460 Example: |
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461 <example> |
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462 timer_resolution 100ms; |
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463 </example> |
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464 </para> |
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465 |
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466 <para> |
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467 Internal implementation of the interval depends on the method used: |
63
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468 <list type="bullet"> |
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469 |
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470 <listitem> |
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471 the <c-def>EVFILT_TIMER</c-def> filter if <literal>kqueue</literal> is used; |
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472 </listitem> |
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473 |
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474 <listitem> |
271 | 475 <c-func>timer_create</c-func> if <literal>eventport</literal> is used; |
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476 </listitem> |
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477 |
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478 <listitem> |
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479 <c-func>setitimer</c-func> otherwise. |
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480 </listitem> |
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481 |
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482 </list> |
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483 </para> |
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484 |
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485 </directive> |
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486 |
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487 |
556
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488 <directive name="use"> |
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489 <syntax><value>method</value></syntax> |
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490 <default/> |
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491 <context>events</context> |
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492 |
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493 <para> |
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494 Specifies the <link doc="events.xml">connection processing</link> |
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495 <value>method</value> to use. |
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496 There is normally no need to specify it explicitly, because nginx will |
556
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497 by default use the most efficient method. |
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498 </para> |
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499 |
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500 </directive> |
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501 |
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502 |
82
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503 <directive name="user"> |
271 | 504 <syntax><value>user</value> [<value>group</value>]</syntax> |
102
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505 <default>nobody nobody</default> |
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506 <context>main</context> |
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507 |
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508 <para> |
271 | 509 Defines <value>user</value> and <value>group</value> |
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510 credentials used by worker processes. |
271 | 511 If <value>group</value> is omitted, a group whose name equals |
512 that of <value>user</value> is used. | |
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513 </para> |
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514 |
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515 </directive> |
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516 |
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517 |
749
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518 <directive name="worker_aio_requests"> |
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519 <syntax><value>number</value></syntax> |
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520 <default>32</default> |
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521 <context>events</context> |
750
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522 <appeared-in>1.1.4</appeared-in> |
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523 <appeared-in>1.0.7</appeared-in> |
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524 |
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525 <para> |
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526 When using <link doc="http/ngx_http_core_module.xml" id="aio"/> |
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527 with the <link doc="../docs/events.xml" id="epoll"/> |
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528 connection processing method, sets the maximum <value>number</value> of |
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529 outstanding asynchronous I/O operations |
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530 for a single worker process. |
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531 </para> |
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532 |
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533 </directive> |
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534 |
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535 |
545
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536 <directive name="worker_connections"> |
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537 <syntax><value>number</value></syntax> |
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538 <default>512</default> |
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539 <context>events</context> |
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540 |
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541 <para> |
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542 Sets the maximum number of simultaneous connections that |
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543 can be opened by a worker process. |
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544 </para> |
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545 |
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546 <para> |
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547 It should be kept in mind that this number includes all connections |
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548 (e.g. connections with proxied servers, among others), |
545
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549 not only connections with clients. |
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550 Another consideration is that the actual number of simultaneous |
966 | 551 connections cannot exceed the current limit on |
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552 the maximum number of open files, which can be changed by |
545
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553 <link id="worker_rlimit_nofile"/>. |
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diff
changeset
|
554 </para> |
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
555 |
e97b46d1842d
Documented the "worker_connections" directive.
Ruslan Ermilov <ru@nginx.com>
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523
diff
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|
556 </directive> |
e97b46d1842d
Documented the "worker_connections" directive.
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parents:
523
diff
changeset
|
557 |
e97b46d1842d
Documented the "worker_connections" directive.
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523
diff
changeset
|
558 |
469
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
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|
559 <directive name="worker_cpu_affinity"> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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|
560 <syntax><value>cpumask</value> ...</syntax> |
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Documented the "worker_cpu_affinity" directive.
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455
diff
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|
561 <default/> |
8275e169f77b
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parents:
455
diff
changeset
|
562 <context>main</context> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
changeset
|
563 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
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diff
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|
564 <para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
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|
565 Binds worker processes to the sets of CPUs. |
957
6d9d4bb571a9
Text review of the ngx_core_module.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
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diff
changeset
|
566 Each CPU set is represented by a bitmask of allowed CPUs. |
469
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
567 There should be a separate set defined for each of the worker processes. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
568 By default, worker processes are not bound to any specific CPUs. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
569 </para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
570 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
571 <para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
572 For example, |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
changeset
|
573 <example> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
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|
574 worker_processes 4; |
8275e169f77b
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parents:
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diff
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|
575 worker_cpu_affinity 0001 0010 0100 1000; |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
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diff
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|
576 </example> |
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parents:
455
diff
changeset
|
577 binds each worker process to a separate CPU, while |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
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|
578 <example> |
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parents:
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diff
changeset
|
579 worker_processes 2; |
8275e169f77b
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Ruslan Ermilov <ru@nginx.com>
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diff
changeset
|
580 worker_cpu_affinity 0101 1010; |
8275e169f77b
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parents:
455
diff
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|
581 </example> |
8275e169f77b
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parents:
455
diff
changeset
|
582 binds the first worker process to CPU0/CPU2, |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
583 and the second worker process to CPU1/CPU3. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
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diff
changeset
|
584 The second example is suitable for hyper-threading. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
585 </para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
586 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
587 <para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
588 <note> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
589 The directive is only available on FreeBSD and Linux. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
590 </note> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
591 </para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
592 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
593 </directive> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
594 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
455
diff
changeset
|
595 |
63
6108fd3217e7
Initial English translation of ngx_core_module.
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diff
changeset
|
596 <directive name="worker_priority"> |
271 | 597 <syntax><value>number</value></syntax> |
102
c76a257f3fd4
The directive name is now automatically printed in <default> and <syntax>.
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diff
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|
598 <default>0</default> |
63
6108fd3217e7
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parents:
diff
changeset
|
599 <context>main</context> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
600 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
601 <para> |
957
6d9d4bb571a9
Text review of the ngx_core_module.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
953
diff
changeset
|
602 Defines the scheduling priority for worker processes like it is |
63
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
603 done by the <command>nice</command> command: a negative |
271 | 604 <value>number</value> |
63
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
605 means higher priority. |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
606 Allowed range normally varies from -20 to 20. |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
607 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
608 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
609 <para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
610 Example: |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
611 <example> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
612 worker_priority -10; |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
613 </example> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
614 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
615 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
616 </directive> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
617 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
618 |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
619 <directive name="worker_processes"> |
740
46d70031bea9
Documented the recently added "auto" parameter of the
Andrey Belov <defan@nginx.com>
parents:
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|
620 <syntax><value>number</value> | <literal>auto</literal></syntax> |
102
c76a257f3fd4
The directive name is now automatically printed in <default> and <syntax>.
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diff
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|
621 <default>1</default> |
63
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parents:
diff
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|
622 <context>main</context> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
623 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
624 <para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
625 Defines the number of worker processes. |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
626 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
627 |
226
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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158
diff
changeset
|
628 <para> |
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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diff
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|
629 The optimal value depends on many factors including (but not |
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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158
diff
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|
630 limited to) the number of CPU cores, the number of hard disk |
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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parents:
158
diff
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|
631 drives that store data, and load pattern. |
957
6d9d4bb571a9
Text review of the ngx_core_module.
Egor Nikitin <yegor.nikitin@gmail.com>
parents:
953
diff
changeset
|
632 When one is in doubt, setting it to the number of available CPU cores |
740
46d70031bea9
Documented the recently added "auto" parameter of the
Andrey Belov <defan@nginx.com>
parents:
659
diff
changeset
|
633 would be a good start (the value “<literal>auto</literal>” |
46d70031bea9
Documented the recently added "auto" parameter of the
Andrey Belov <defan@nginx.com>
parents:
659
diff
changeset
|
634 will try to autodetect it). |
742
3a2e35f4c279
Documented that "worker_processes auto" appeared in version 1.3.8.
Ruslan Ermilov <ru@nginx.com>
parents:
740
diff
changeset
|
635 <note> |
3a2e35f4c279
Documented that "worker_processes auto" appeared in version 1.3.8.
Ruslan Ermilov <ru@nginx.com>
parents:
740
diff
changeset
|
636 The <literal>auto</literal> parameter is supported starting from |
764
f8434fdd3cd9
The "auto" parameter of the ""worker_processes" directive
Ruslan Ermilov <ru@nginx.com>
parents:
750
diff
changeset
|
637 versions 1.3.8 and 1.2.5. |
742
3a2e35f4c279
Documented that "worker_processes auto" appeared in version 1.3.8.
Ruslan Ermilov <ru@nginx.com>
parents:
740
diff
changeset
|
638 </note> |
226
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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parents:
158
diff
changeset
|
639 </para> |
c4b33b07dcfe
Added some basic hints on how to tune "worker_processes".
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parents:
158
diff
changeset
|
640 |
63
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
641 </directive> |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
642 |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
643 |
82
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
644 <directive name="worker_rlimit_core"> |
271 | 645 <syntax><value>size</value></syntax> |
82
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
646 <default/> |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
647 <context>main</context> |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
648 |
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
649 <para> |
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
650 Changes the limit on the largest size of a core file |
89c31b453d40
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63
diff
changeset
|
651 (<c-def>RLIMIT_CORE</c-def>) for worker processes. |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
652 Used to increase the limit without restarting the main process. |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
653 </para> |
89c31b453d40
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Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
654 |
89c31b453d40
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Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
655 </directive> |
89c31b453d40
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parents:
63
diff
changeset
|
656 |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
657 |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
658 <directive name="worker_rlimit_nofile"> |
271 | 659 <syntax><value>number</value></syntax> |
82
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
660 <default/> |
89c31b453d40
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parents:
63
diff
changeset
|
661 <context>main</context> |
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
662 |
89c31b453d40
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parents:
63
diff
changeset
|
663 <para> |
89c31b453d40
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parents:
63
diff
changeset
|
664 Changes the limit on the maximum number of open files |
89c31b453d40
Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
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63
diff
changeset
|
665 (<c-def>RLIMIT_NOFILE</c-def>) for worker processes. |
89c31b453d40
Sorted directives alphabetically.
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63
diff
changeset
|
666 Used to increase the limit without restarting the main process. |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
667 </para> |
89c31b453d40
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parents:
63
diff
changeset
|
668 |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
669 </directive> |
89c31b453d40
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Ruslan Ermilov <ru@nginx.com>
parents:
63
diff
changeset
|
670 |
89c31b453d40
Sorted directives alphabetically.
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parents:
63
diff
changeset
|
671 |
554
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
672 <directive name="worker_rlimit_sigpending"> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
673 <syntax><value>number</value></syntax> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
674 <default/> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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parents:
545
diff
changeset
|
675 <context>main</context> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
676 |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
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parents:
545
diff
changeset
|
677 <para> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
678 On systems that support <link doc="events.xml" id="rtsig"/> |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
679 connection processing method, |
ccb7451af1d8
Documented the "worker_rlimit_sigpending" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
545
diff
changeset
|
680 changes the limit on the number of signals that may be queued |
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681 (<c-def>RLIMIT_SIGPENDING</c-def>) for worker processes. |
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682 Used to increase the limit without restarting the main process. |
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683 </para> |
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684 |
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685 </directive> |
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686 |
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687 |
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688 <directive name="working_directory"> |
271 | 689 <syntax><value>directory</value></syntax> |
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690 <default/> |
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691 <context>main</context> |
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692 |
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693 <para> |
957
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694 Defines the current working directory for a worker process. |
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695 It is primarily used when writing a core-file, in which case |
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696 a worker process should have write permission for the |
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697 specified directory. |
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698 </para> |
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699 |
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700 </directive> |
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701 |
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702 </section> |
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703 |
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704 </module> |