Index-dependent HTML caching
Describes the indexing aspects of HTML caching.
Some index update strategies are designed to be invoked either when publishing completes or after a specific interval of time has passed. If your Sitecore instance uses HTML caching for renderings, controls, or sublayouts that contain code, and this code depends on an index, a race condition between HTML cache clearing and index update operations can occur.
You can solve this issue by selecting
Clear on Index Update for these renderings, controls, and sublayouts:
You can do this on the rendering definition item or on the layout details for a specific content item, in a similar way to how you can set the
Vary by settings.
When you select
Clear on Index Update, Sitecore clears the HTML cache of renderings when the index is updated, using the IndexDependentCacheManager component. The execution of this component is triggered from the
indexing:end:remote events in the
<event name="indexing:end"> <handler type="Sitecore.ContentSearch.Maintenance. IndexDependentHtmlCacheManager, Sitecore.ContentSearch" method="Clear" /> </event> <event name="indexing:end:remote"> <handler type="Sitecore.ContentSearch.Maintenance. IndexDependentHtmlCacheManager, Sitecore.ContentSearch" method="Clear" /> </event>