Invalidating a Search cache

You can invalidate the contents of a specific cache by issuing a call to the Search REST API

If you want to manually invalidate the contents of a cache, you can do by issuing a call to the REST service. The call follows the following format:
https://search:3738/search/admin/resources/index/cache/invalidate?sinceWhen=2017-10-26 11:11:11.234
Where
sinceWhen
The date and time after which you want the cache invalidated. For example, sinceWhen=2017-10-26 11:11:11.234.