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comparison xml/en/docs/http/ngx_http_proxy_module.xml @ 508:5e332fafd228

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Documented "cache loader" and its parameters.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 24 Apr 2012 11:09:33 +0000
parents 657848837328
children f8652d663b62
comparison
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507:d00a4f9b1c5d 508:5e332fafd228
246 <syntax> 246 <syntax>
247 <value>path</value> 247 <value>path</value>
248 [<literal>levels</literal>=<value>levels</value>] 248 [<literal>levels</literal>=<value>levels</value>]
249 <literal>keys_zone</literal>=<value>name</value>:<value>size</value> 249 <literal>keys_zone</literal>=<value>name</value>:<value>size</value>
250 [<literal>inactive</literal>=<value>time</value>] 250 [<literal>inactive</literal>=<value>time</value>]
251 [<literal>max_size</literal>=<value>size</value>]</syntax> 251 [<literal>max_size</literal>=<value>size</value>]
252 [<literal>loader_files</literal>=<value>number</value>]
253 [<literal>loader_sleep</literal>=<value>time</value>]
254 [<literal>loader_threshold</literal>=<value>time</value>]</syntax>
252 <default/> 255 <default/>
253 <context>http</context> 256 <context>http</context>
254 257
255 <para> 258 <para>
256 Sets path and other parameters of a cache. 259 Sets path and other parameters of a cache.
291 294
292 <para> 295 <para>
293 The special process “cache manager” monitors the maximum cache size set 296 The special process “cache manager” monitors the maximum cache size set
294 by the <literal>max_size</literal> parameter; 297 by the <literal>max_size</literal> parameter;
295 when this size is exceeded it removes the least recently used data. 298 when this size is exceeded it removes the least recently used data.
299 </para>
300
301 <para>
302 A minute after the start the special process “cache loader” is activated
303 that loads information about previously cached data stored on file system
304 into a cache zone.
305 A load is done in iterations.
306 During one iteration no more than <literal>loader_files</literal> items
307 are loaded (by default, 100).
308 Besides, the duration of one iteration is limited by the
309 <literal>loader_threshold</literal> parameter (by default, 200 milliseconds).
310 A pause is made between iterations, configured by the
311 <literal>loader_sleep</literal> parameter (by default, 50 milliseconds).
296 </para> 312 </para>
297 313
298 </directive> 314 </directive>
299 315
300 316