Flush cache before deleting an index or not?

Elastic Stack Elasticsearch
1

Hi! I am recreating every day my whole index. I am creating complete new index and put all the data in it. Delete the old one and set the new one as active. Should I clear the cache of the old index before I delete it or the delete command is doing this automatically ?

Thanks
Nik

2

Deletion of an index should release all associated with this index data structures including cache.