could you please confirm if below line is removing all the products from cache?
_cacheManager.RemoveByPattern(PRODUCTS_PATTERN_KEY);

I noticed this line in both InsertProduct and DeleteProduct methods of ProductService.

Why should adding single product to Db cause all the Products from cache to be removed?
Why should deleting a single product from Db cause all the Products from cache to be removed?

Hi,
It works as expected. Products may have a many dependencies. For example orders, related products, recommended products, personalized products, etc. It's safier to delete all cache.