Clear cache programmatically in Drupal 8

I am Using Drupal 8 I have Taxonomy Person with custom defined attribute FirstName I have a custom module family_tree that has a function Show_person that shows 1 Taxonomy Person term. Action Sequence A: call url: /family-tree/show-person/2 (shows FirstName = Joe) call url: /taxonomy/term/2/edit (changing FirstName = Frank) call url: /family-tree/show-person/2 (and it shows the OLD FirstName = Joe) Action Sequence B: call url: /family-tree/show-person/2 (shows FirstName = Joe) call url: /taxonomy/term/2/edit (changing FirstName = Frank) go manually to /admin/config/development/performance and click „Clear All caches“ call url: /family-tree/show-person/2 (and it shows the NEW FirstName = Frank) Action Sequence C: Inside the custom module family_tree‘s function Show_person, just before calling $personObject = \Drupal::entityTypeManager()-> getStorage('taxonomy_term')-> load($person->tid);, I inserted drupal_flush_all_caches(); And then: call url: /family-tree/show-person/2 (shows FirstName = Joe, before showing, drupal_flush_all_caches(); was called) call url: /taxonomy/term/2/edit (changing FirstName = Frank) call url: /family-tree/show-person/2 (and it still shows the OLD FirstName = Joe, before showing, drupal_flush_all_caches(); was called) Action Sequence D: The same as Sequence C, but instead of drupal_flush_all_caches(); I called $result = db_query("TRUNCATE cache_config"); $result = db_query("TRUNCATE cache_container"); $result = db_query("TRUNCATE cache_data"); $result = db_query("TRUNCATE cache_default"); $result = db_query("TRUNCATE cache_discovery"); $result = db_query("TRUNCATE cache_dynamic_page_cache"); $result = db_query("TRUNCATE cache_entity"); $result = db_query("TRUNCATE cache_menu"); $result = db_query("TRUNCATE cache_render"); $result = db_query("TRUNCATE cache_toolbar"); Can you suggest, please, what could be the reason for my problem, i.e. that manual „Clear All Cashes“ works and programmatical calls do not work for me? Thank you. Jozef

I managed to call drupal_flush_all_caches() from a proper place, from hook_node_update($node). However, I would need only flush the cache for a specific url, e.g. mydomain/mymodule/myfunction/{node_id}. I spent a couple of hours researching, but found only a way how to do it in Drupal 7. Can I flush the cache for a specific url in Drupal 8?