Mercurial > hg > nginx-site
annotate xml/en/docs/ngx_core_module.xml @ 1186:8125bec5c7a1
Upstream: documented the $upstream_cookie_* variables.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Tue, 29 Apr 2014 19:27:51 +0400 |
parents | 1594ed379f1f |
children | aab8a1667171 |
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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 |
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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="9"> |
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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>] |
271 | 149 [<literal>debug</literal> | |
150 <literal>info</literal> | | |
151 <literal>notice</literal> | | |
152 <literal>warn</literal> | | |
153 <literal>error</literal> | | |
154 <literal>crit</literal> | | |
155 <literal>alert</literal> | | |
156 <literal>emerg</literal>]</syntax> | |
158
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157 <default>logs/error.log error</default> |
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158 <context>main</context> |
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159 <context>http</context> |
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160 <context>server</context> |
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161 <context>location</context> |
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162 |
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163 <para> |
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164 Configures logging. |
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165 Several logs can be specified on the same level (1.5.2). |
158
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166 </para> |
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167 |
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168 <para> |
271 | 169 The first parameter defines a file that will store the log. |
158
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170 <!-- |
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171 If filename is not absolute, it is prefixed with the prefix path. |
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172 --> |
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173 The special value <literal>stderr</literal> selects the standard error file. |
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174 Logging to syslog can be configured by specifying |
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175 the “<literal>syslog:</literal>” prefix. |
158
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176 </para> |
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177 |
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178 <para> |
271 | 179 The second parameter determines the level of logging. |
158
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180 Log levels above are listed in the order of increasing severity. |
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181 Setting a certain log level will cause all messages of |
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182 the specified and more severe log levels to be logged. |
271 | 183 For example, the default level <literal>error</literal> will |
184 cause <literal>error</literal>, <literal>crit</literal>, | |
185 <literal>alert</literal>, and <literal>emerg</literal> messages | |
158
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186 to be logged. |
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187 If this parameter is omitted then <literal>error</literal> is used. |
158
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188 <note> |
271 | 189 For <literal>debug</literal> logging to work, nginx needs to |
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190 be built with <literal>--with-debug</literal>, |
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191 see “<link doc="debugging_log.xml"/>”. |
158
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192 </note> |
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193 </para> |
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194 |
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195 <para> |
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196 The following parameters configure logging to syslog: |
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197 <list type="tag"> |
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198 |
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199 <tag-name><literal>server=</literal><value>address</value></tag-name> |
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200 <tag-desc> |
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201 Defines an address of a syslog server. |
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202 An address can be specified as a domain name or IP address, |
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203 and an optional port, or as a UNIX-domain socket path |
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204 specified after the “<literal>unix:</literal>” prefix. |
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205 If port is not specified, the port 514 is used. |
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206 If a domain name resolves to several IP addresses, the first resolved |
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207 address is used. |
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208 </tag-desc> |
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209 |
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210 <tag-name><literal>facility=</literal><value>string</value></tag-name> |
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211 <tag-desc> |
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212 Sets facility of syslog messages, as defined in |
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213 <link url="http://tools.ietf.org/html/rfc3164#section-4.1.1">RFC 3164</link>. |
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214 Facility can be one of “<literal>kern</literal>”, “<literal>user</literal>”, |
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215 “<literal>mail</literal>”, “<literal>daemon</literal>”, |
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216 “<literal>auth</literal>”, “<literal>intern</literal>”, |
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217 “<literal>lpr</literal>”, “<literal>news</literal>”, “<literal>uucp</literal>”, |
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218 “<literal>clock</literal>”, “<literal>authpriv</literal>”, |
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219 “<literal>ftp</literal>”, “<literal>ntp</literal>”, “<literal>audit</literal>”, |
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220 “<literal>alert</literal>”, “<literal>cron</literal>”, |
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221 “<literal>local0</literal>”..“<literal>local7</literal>”. |
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222 Default is “<literal>local7</literal>”. |
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223 </tag-desc> |
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224 |
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225 <tag-name><literal>tag=</literal><value>string</value></tag-name> |
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226 <tag-desc> |
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227 Sets tag of syslog messages. |
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228 Default is “<literal>nginx</literal>”. |
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229 </tag-desc> |
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230 |
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231 <!-- |
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232 <tag-name><literal>bare=</literal><literal>on</literal> | |
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233 <literal>off</literal></tag-name> |
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234 <tag-desc> |
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235 If enabled, messages are sent without syslog headers. |
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236 Default is <literal>off</literal>. |
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237 </tag-desc> |
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238 --> |
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239 |
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240 </list> |
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241 Example syslog configuration: |
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242 <example> |
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243 error_log syslog:server=192.168.1.1 debug; |
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244 error_log syslog:server=unix:/var/log/nginx.sock; |
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245 error_log syslog:server=[2001:db8::1]:12345,facility=local7,tag=nginx error; |
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246 </example> |
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247 </para> |
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248 |
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249 <para> |
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250 <note> |
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251 Logging to syslog is available as part of our |
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252 <commercial_version>commercial subscription</commercial_version>. |
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253 </note> |
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254 </para> |
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255 |
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256 </directive> |
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257 |
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258 |
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259 <directive name="env"> |
271 | 260 <syntax><value>variable</value>[=<value>value</value>]</syntax> |
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261 <default>TZ</default> |
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262 <context>main</context> |
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263 |
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264 <para> |
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265 By default, nginx removes all environment variables inherited |
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266 from its parent process except the TZ variable. |
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267 This directive allows preserving some of the inherited variables, |
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268 changing their values, or creating new environment variables. |
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269 These variables are then: |
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270 <list type="bullet"> |
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271 |
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272 <listitem> |
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273 inherited during a <link doc="control.xml" id="upgrade">live upgrade</link> |
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274 of an executable file; |
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275 </listitem> |
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276 |
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277 <listitem> |
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278 used by the |
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279 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link> module; |
63
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280 </listitem> |
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281 |
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282 <listitem> |
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283 used by worker processes. |
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284 One should bear in mind that controlling system libraries in this way |
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285 is not always possible as it is common for libraries to check |
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286 variables only during initialization, well before they can be set |
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287 using this directive. |
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288 An exception from this is an above mentioned |
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289 <link doc="control.xml" id="upgrade">live upgrade</link> |
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290 of an executable file. |
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291 </listitem> |
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292 |
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293 </list> |
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294 </para> |
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295 |
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296 <para> |
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297 The TZ variable is always inherited and available to the |
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298 <link doc="http/ngx_http_perl_module.xml">ngx_http_perl_module</link> |
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299 module, unless it is configured explicitly. |
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300 </para> |
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301 |
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302 <para> |
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303 Usage example: |
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304 <example> |
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305 env MALLOC_OPTIONS; |
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306 env PERL5LIB=/data/site/modules; |
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307 env OPENSSL_ALLOW_PROXY_CERTS=1; |
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308 </example> |
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309 </para> |
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310 |
444
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311 <para> |
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312 <note> |
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313 The NGINX environment variable is used internally by nginx |
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314 and should not be set directly by the user. |
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315 </note> |
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316 </para> |
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317 |
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318 </directive> |
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319 |
249 | 320 |
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321 <directive name="events"> |
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322 <syntax block="yes"/> |
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323 <default/> |
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324 <context>main</context> |
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325 |
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326 <para> |
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327 Provides the configuration file context in which the directives that |
556
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328 affect connection processing are specified. |
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329 </para> |
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330 |
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331 </directive> |
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332 |
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333 |
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334 <directive name="include"> |
271 | 335 <syntax><value>file</value> | <value>mask</value></syntax> |
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336 <default/> |
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337 <context/> |
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338 |
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339 <para> |
271 | 340 Includes another <value>file</value>, or files matching the |
341 specified <value>mask</value>, into configuration. | |
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342 Included files should consist of |
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343 syntactically correct directives and blocks. |
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344 </para> |
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345 |
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346 <para> |
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347 Usage example: |
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348 <example> |
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349 include mime.types; |
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350 include vhosts/*.conf; |
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351 </example> |
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352 </para> |
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353 |
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354 </directive> |
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355 |
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356 |
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357 <directive name="lock_file"> |
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358 <syntax><value>file</value></syntax> |
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359 <default>logs/nginx.lock</default> |
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360 <context>main</context> |
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361 |
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362 <para> |
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363 nginx uses the locking mechanism to implement <link id="accept_mutex"/> |
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364 and serialize access to shared memory. |
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365 On most systems the locks are implemented using atomic operations, |
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366 and this directive is ignored. |
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367 On other systems the “lock file” mechanism is used. |
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368 This directive specifies a prefix for the names of lock files. |
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369 </para> |
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370 |
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371 </directive> |
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372 |
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373 |
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374 <directive name="master_process"> |
271 | 375 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
102
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376 <default>on</default> |
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377 <context>main</context> |
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378 |
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379 <para> |
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380 Determines whether worker processes are started. |
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381 This directive is intended for nginx developers. |
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382 </para> |
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383 |
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384 </directive> |
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385 |
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386 |
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387 <directive name="multi_accept"> |
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388 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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389 <default>off</default> |
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390 <context>events</context> |
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391 |
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392 <para> |
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393 If <literal>multi_accept</literal> is disabled, a worker process |
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394 will accept one new connection at a time. |
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395 Otherwise, a worker process |
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396 will accept all new connections at a time. |
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397 <note> |
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398 The directive is ignored if <link doc="events.xml" id="kqueue"/> |
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399 connection processing method is used, because it reports |
571
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400 the number of new connections waiting to be accepted. |
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401 </note> |
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402 <note> |
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403 The use of <link doc="events.xml" id="rtsig"/> |
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404 connection processing method |
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405 automatically enables <literal>multi_accept</literal>. |
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406 </note> |
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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 |
289
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412 <directive name="pcre_jit"> |
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413 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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414 <default>off</default> |
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415 <context>main</context> |
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416 <appeared-in>1.1.12</appeared-in> |
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417 |
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418 <para> |
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419 Enables or disables the use of “just-in-time compilation” (PCRE JIT) |
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420 for the regular expressions known by the time of configuration parsing. |
289
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421 </para> |
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422 |
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423 <para> |
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424 PCRE JIT can speed up processing of regular expressions significantly. |
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425 <note> |
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426 The JIT is available in PCRE libraries starting from version 8.20 |
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427 built with the <literal>--enable-jit</literal> configuration parameter. |
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428 When the PCRE library is built with nginx (<literal>--with-pcre=</literal>), |
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429 the JIT support is enabled via the |
289
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430 <literal>--with-pcre-jit</literal> configuration parameter. |
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431 </note> |
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432 </para> |
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433 |
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434 </directive> |
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435 |
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436 |
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437 <directive name="pid"> |
271 | 438 <syntax><value>file</value></syntax> |
102
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439 <default>nginx.pid</default> |
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440 <context>main</context> |
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441 |
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442 <para> |
271 | 443 Defines a <value>file</value> that will store the process ID of the main process. |
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444 </para> |
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445 |
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446 </directive> |
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447 |
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448 |
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449 <directive name="ssl_engine"> |
271 | 450 <syntax><value>device</value></syntax> |
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451 <default/> |
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452 <context>main</context> |
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453 |
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454 <para> |
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455 Defines the name of the hardware SSL accelerator. |
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456 </para> |
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457 |
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458 </directive> |
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459 |
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460 |
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461 <directive name="timer_resolution"> |
271 | 462 <syntax><value>interval</value></syntax> |
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463 <default/> |
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464 <context>main</context> |
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465 |
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466 <para> |
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467 Reduces timer resolution in worker processes, thus reducing the |
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468 number of <c-func>gettimeofday</c-func> system calls made. |
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469 By default, <c-func>gettimeofday</c-func> is called each time |
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470 a kernel event is received. |
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471 With reduced resolution, <c-func>gettimeofday</c-func> is only |
271 | 472 called once per specified <value>interval</value>. |
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473 </para> |
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474 |
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475 <para> |
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476 Example: |
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477 <example> |
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478 timer_resolution 100ms; |
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479 </example> |
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480 </para> |
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481 |
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482 <para> |
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483 Internal implementation of the interval depends on the method used: |
63
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484 <list type="bullet"> |
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485 |
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486 <listitem> |
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487 the <c-def>EVFILT_TIMER</c-def> filter if <literal>kqueue</literal> is used; |
63
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488 </listitem> |
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489 |
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490 <listitem> |
271 | 491 <c-func>timer_create</c-func> if <literal>eventport</literal> is used; |
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492 </listitem> |
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493 |
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494 <listitem> |
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495 <c-func>setitimer</c-func> otherwise. |
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496 </listitem> |
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497 |
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498 </list> |
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499 </para> |
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500 |
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501 </directive> |
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502 |
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503 |
556
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504 <directive name="use"> |
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505 <syntax><value>method</value></syntax> |
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506 <default/> |
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507 <context>events</context> |
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508 |
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509 <para> |
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510 Specifies the <link doc="events.xml">connection processing</link> |
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511 <value>method</value> to use. |
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512 There is normally no need to specify it explicitly, because nginx will |
556
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513 by default use the most efficient method. |
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514 </para> |
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515 |
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516 </directive> |
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517 |
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518 |
82
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519 <directive name="user"> |
271 | 520 <syntax><value>user</value> [<value>group</value>]</syntax> |
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521 <default>nobody nobody</default> |
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522 <context>main</context> |
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523 |
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524 <para> |
271 | 525 Defines <value>user</value> and <value>group</value> |
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526 credentials used by worker processes. |
271 | 527 If <value>group</value> is omitted, a group whose name equals |
528 that of <value>user</value> is used. | |
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529 </para> |
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530 |
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531 </directive> |
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|
532 |
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Initial English translation of ngx_core_module.
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|
533 |
749
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|
534 <directive name="worker_aio_requests"> |
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535 <syntax><value>number</value></syntax> |
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|
536 <default>32</default> |
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|
537 <context>events</context> |
750
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538 <appeared-in>1.1.4</appeared-in> |
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|
539 <appeared-in>1.0.7</appeared-in> |
749
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|
540 |
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|
541 <para> |
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|
542 When using <link doc="http/ngx_http_core_module.xml" id="aio"/> |
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543 with the <link doc="../docs/events.xml" id="epoll"/> |
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|
544 connection processing method, sets the maximum <value>number</value> of |
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|
545 outstanding asynchronous I/O operations |
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546 for a single worker process. |
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|
547 </para> |
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|
548 |
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|
549 </directive> |
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|
550 |
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Documented 'worker_aio_requests' directive.
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|
551 |
545
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
552 <directive name="worker_connections"> |
e97b46d1842d
Documented the "worker_connections" directive.
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553 <syntax><value>number</value></syntax> |
e97b46d1842d
Documented the "worker_connections" directive.
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554 <default>512</default> |
e97b46d1842d
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|
555 <context>events</context> |
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diff
changeset
|
556 |
e97b46d1842d
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557 <para> |
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|
558 Sets the maximum number of simultaneous connections that |
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559 can be opened by a worker process. |
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560 </para> |
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|
561 |
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Documented the "worker_connections" directive.
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|
562 <para> |
e97b46d1842d
Documented the "worker_connections" directive.
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|
563 It should be kept in mind that this number includes all connections |
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Text review of the ngx_core_module.
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|
564 (e.g. connections with proxied servers, among others), |
545
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
565 not only connections with clients. |
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|
566 Another consideration is that the actual number of simultaneous |
966 | 567 connections cannot exceed the current limit on |
957
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|
568 the maximum number of open files, which can be changed by |
545
e97b46d1842d
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diff
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|
569 <link id="worker_rlimit_nofile"/>. |
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
570 </para> |
e97b46d1842d
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523
diff
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|
571 |
e97b46d1842d
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parents:
523
diff
changeset
|
572 </directive> |
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
573 |
e97b46d1842d
Documented the "worker_connections" directive.
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diff
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|
574 |
469
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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455
diff
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|
575 <directive name="worker_cpu_affinity"> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
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|
576 <syntax><value>cpumask</value> ...</syntax> |
8275e169f77b
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parents:
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diff
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|
577 <default/> |
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578 <context>main</context> |
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parents:
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diff
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|
579 |
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|
580 <para> |
8275e169f77b
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parents:
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diff
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|
581 Binds worker processes to the sets of CPUs. |
957
6d9d4bb571a9
Text review of the ngx_core_module.
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parents:
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|
582 Each CPU set is represented by a bitmask of allowed CPUs. |
469
8275e169f77b
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parents:
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diff
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|
583 There should be a separate set defined for each of the worker processes. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
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584 By default, worker processes are not bound to any specific CPUs. |
8275e169f77b
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585 </para> |
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parents:
455
diff
changeset
|
586 |
8275e169f77b
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|
587 <para> |
8275e169f77b
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|
588 For example, |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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diff
changeset
|
589 <example> |
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parents:
455
diff
changeset
|
590 worker_processes 4; |
8275e169f77b
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parents:
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diff
changeset
|
591 worker_cpu_affinity 0001 0010 0100 1000; |
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parents:
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diff
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|
592 </example> |
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|
593 binds each worker process to a separate CPU, while |
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Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
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|
594 <example> |
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parents:
455
diff
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|
595 worker_processes 2; |
8275e169f77b
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|
596 worker_cpu_affinity 0101 1010; |
8275e169f77b
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|
597 </example> |
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|
598 binds the first worker process to CPU0/CPU2, |
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|
599 and the second worker process to CPU1/CPU3. |
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|
600 The second example is suitable for hyper-threading. |
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parents:
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diff
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|
601 </para> |
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Documented the "worker_cpu_affinity" directive.
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|
602 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
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diff
changeset
|
603 <para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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455
diff
changeset
|
604 <note> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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|
605 The directive is only available on FreeBSD and Linux. |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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|
606 </note> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
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changeset
|
607 </para> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
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diff
changeset
|
608 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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parents:
455
diff
changeset
|
609 </directive> |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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|
610 |
8275e169f77b
Documented the "worker_cpu_affinity" directive.
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455
diff
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|
611 |
63
6108fd3217e7
Initial English translation of ngx_core_module.
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|
612 <directive name="worker_priority"> |
271 | 613 <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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|
614 <default>0</default> |
63
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changeset
|
615 <context>main</context> |
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Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
616 |
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parents:
diff
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|
617 <para> |
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parents:
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|
618 Defines the scheduling priority for worker processes like it is |
63
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Initial English translation of ngx_core_module.
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parents:
diff
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|
619 done by the <command>nice</command> command: a negative |
271 | 620 <value>number</value> |
63
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|
621 means higher priority. |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
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|
622 Allowed range normally varies from -20 to 20. |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
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|
623 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
624 |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
625 <para> |
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Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
626 Example: |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
627 <example> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
628 worker_priority -10; |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
629 </example> |
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parents:
diff
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|
630 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
631 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
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|
632 </directive> |
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Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
633 |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
634 |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
635 <directive name="worker_processes"> |
740
46d70031bea9
Documented the recently added "auto" parameter of the
Andrey Belov <defan@nginx.com>
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636 <syntax><value>number</value> | <literal>auto</literal></syntax> |
102
c76a257f3fd4
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|
637 <default>1</default> |
63
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parents:
diff
changeset
|
638 <context>main</context> |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
639 |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
640 <para> |
6108fd3217e7
Initial English translation of ngx_core_module.
Ruslan Ermilov <ru@nginx.com>
parents:
diff
changeset
|
641 Defines the number of worker processes. |
6108fd3217e7
Initial English translation of ngx_core_module.
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parents:
diff
changeset
|
642 </para> |
6108fd3217e7
Initial English translation of ngx_core_module.
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diff
changeset
|
643 |
226
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Added some basic hints on how to tune "worker_processes".
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158
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|
644 <para> |
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Added some basic hints on how to tune "worker_processes".
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645 The optimal value depends on many factors including (but not |
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Added some basic hints on how to tune "worker_processes".
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|
646 limited to) the number of CPU cores, the number of hard disk |
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diff
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|
647 drives that store data, and load pattern. |
957
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parents:
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diff
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|
648 When one is in doubt, setting it to the number of available CPU cores |
740
46d70031bea9
Documented the recently added "auto" parameter of the
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parents:
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diff
changeset
|
649 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:
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diff
changeset
|
650 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
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|
651 <note> |
3a2e35f4c279
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740
diff
changeset
|
652 The <literal>auto</literal> parameter is supported starting from |
764
f8434fdd3cd9
The "auto" parameter of the ""worker_processes" directive
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parents:
750
diff
changeset
|
653 versions 1.3.8 and 1.2.5. |
742
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654 </note> |
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655 </para> |
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656 |
63
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657 </directive> |
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658 |
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659 |
82
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660 <directive name="worker_rlimit_core"> |
271 | 661 <syntax><value>size</value></syntax> |
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662 <default/> |
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663 <context>main</context> |
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664 |
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665 <para> |
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666 Changes the limit on the largest size of a core file |
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667 (<c-def>RLIMIT_CORE</c-def>) for worker processes. |
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668 Used to increase the limit without restarting the main process. |
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669 </para> |
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670 |
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671 </directive> |
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672 |
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673 |
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674 <directive name="worker_rlimit_nofile"> |
271 | 675 <syntax><value>number</value></syntax> |
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676 <default/> |
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677 <context>main</context> |
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678 |
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679 <para> |
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680 Changes the limit on the maximum number of open files |
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681 (<c-def>RLIMIT_NOFILE</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 |
554
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688 <directive name="worker_rlimit_sigpending"> |
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689 <syntax><value>number</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> |
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694 On systems that support <link doc="events.xml" id="rtsig"/> |
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695 connection processing method, |
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696 changes the limit on the number of signals that may be queued |
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697 (<c-def>RLIMIT_SIGPENDING</c-def>) for worker processes. |
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698 Used to increase the limit without restarting the main process. |
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699 </para> |
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700 |
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701 </directive> |
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702 |
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703 |
63
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704 <directive name="working_directory"> |
271 | 705 <syntax><value>directory</value></syntax> |
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706 <default/> |
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707 <context>main</context> |
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708 |
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709 <para> |
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710 Defines the current working directory for a worker process. |
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711 It is primarily used when writing a core-file, in which case |
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712 a worker process should have write permission for the |
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713 specified directory. |
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714 </para> |
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715 |
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716 </directive> |
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717 |
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718 </section> |
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719 |
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720 </module> |