Mercurial > hg > nginx-site
comparison xml/en/docs/http/ngx_http_proxy_module.xml @ 504:695f83494c19
Emphasized on what the "updating" parameter of the "proxy_cache_use_stale"
directive achieves. Referenced the "proxy_cache_lock" directive from there,
which has similar effect when populating a new cache element.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Tue, 24 Apr 2012 06:54:47 +0000 |
| parents | cbc2d1b51cb6 |
| children | 657848837328 |
comparison
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| 503:aed015c3dedd | 504:695f83494c19 |
|---|---|
| 312 If an error occurs while working with the proxied server it is possible | 312 If an error occurs while working with the proxied server it is possible |
| 313 to use a stale cached response. | 313 to use a stale cached response. |
| 314 This directives determines in which cases it is permitted. | 314 This directives determines in which cases it is permitted. |
| 315 The directive’s parameters match those of the | 315 The directive’s parameters match those of the |
| 316 <link id="proxy_next_upstream"/> directive. | 316 <link id="proxy_next_upstream"/> directive. |
| 317 </para> | |
| 318 | |
| 319 <para> | |
| 317 Additionally, the <literal>updating</literal> parameter permits | 320 Additionally, the <literal>updating</literal> parameter permits |
| 318 to use a stale cached response if it is currently being updated. | 321 to use a stale cached response if it is currently being updated. |
| 322 This allows to minimize the number of accesses to proxied servers | |
| 323 when updating cached data. | |
| 324 </para> | |
| 325 | |
| 326 <para> | |
| 327 To minimize the number of accesses to proxied servers when | |
| 328 populating a new cache element, the <link id="proxy_cache_lock"/> | |
| 329 directive can be used. | |
| 319 </para> | 330 </para> |
| 320 | 331 |
| 321 </directive> | 332 </directive> |
| 322 | 333 |
| 323 | 334 |