How does one flush the non-database cache (such as memcache) from CiviCRM code?

Question

I've seen from a different question a suggestion to use CRM_Core_Invoke::rebuildMenuAndCaches() as the "granddaddy" of all cache flushing. However, I'd like to know if this is only clearing the cache in the database, such as civicrm_cache and so on or if it also clears non-database cache as well such as memcache.

As far as I can tell the above function calls CRM_Core_Config::cleanupCaches() which calls CRM_Core_Config::clearDBCache() and that function truncates various cache tables. Am I missing something? How do the other caching backends get flushed?

Answer 1

Currently the function CRM_Core_Invoke::rebuildMenuAndCaches does not flush the memory caches, even though it will rebuild the database cache, menus and sessions. In order to also flush the memory caches you need to also call: CRM_Utils_System::flushCache( ); (This was confirmed by Lobo but I think it needed to be written more explicitly as an answer and not as how things should be.)

Answer 2

I think the function CRM_Core_Invoke::rebuildMenuAndCaches should also flush the memory caches, and hence call: CRM_Utils_System::flushCache( );

This will make things more consistent and actually rebuild all caches as the function name suggests