jarifibrahim commented :
Hey @varun06, once the cache reaches the capacity (10 gigs) in this case, every new addition would try to make space for new insertions and so it would cause evictions.
Also, while inserting an item in the cache, you would set the cost param in the cache.Set call. Ensure that cost represents the correct cost of the item. If you set the cost of a single item as 10 GB, ristretto will evict all the old data when this key is inserted.