With Sitefinity CMS, you can configure the way your content and pages are cached which affects and optimizes the overall performance of your system.You do this by configuring cache profiles that include both the output and client cache. You can apply cache profiles globally on application level or choose which specific profile to apply on a page or library level. Cache profiles have a similar structure. For details, see Configure and manage cache profiles.
You can configure the following types of cache:
You can apply output caching on page and library level.
When applying output cache on page level (including personalized pages), Sitefinity CMS caches all rendered output, including widgets. Sitefinity CMS caches a different cache variation for each personalization segment of the page. On widget level, Sitefinity CMS performs cache substitution whenever a widget has an inherent dynamic behavior. For example, this is the case of the login name, login status, and so on. Sitefinity CMS also has output cache for anonymous forum users.
Sitefinity CMS performs post cache substitution – these widgets are written using Razor syntax and right after the cached page is about to be served, Sitefinity CMS injects the string that the widget's HTML output into the response.
Output cache is stored in the memory and is cleared on application start.
You can have only one default cache profile, which is used by default for all pages. You can, however, change the cache profile on page level. Thus, you have different cache behaviors for different pages (sections of your site). Once a page is requested, and if the page is not found on the server output cache, Sitefinity CMS reads the output cache and output cache profile settings to determine whether it should add the page in cache and with what settings. Each consecutive request for the same page is served from cache, unless:
By default, Sitefinity CMS output cache varies by user agent (web browser), meaning that the system creates different cached versions of the page depending on the user agent (web browser) the page is requested from.
Output cache is disabled by default for logged in users that have backend (administrative) access and are browsing the site. Thus, the users can observe the effect of their changes immediately.
In addition, you can configure CDN and proxy server support for pages or media items. For more information, see Use CDN storage for content libraries.
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