Page: Caches -> select cache container -> select cache.
Configuration of the cache: replicated cache, 2 nodes in the domain

In the "Cache content" tab, there is a field "# Entries" which should probably show number of entries in the cache. When I put 100 entries in the cache, this field shows 200. Given that it's replicated cache, I think what's happening is that it shows numberOfNodes*numberOfEntries, because when I try to put 100 entries with 3 nodes in the domain, the "# Entries" shows 300.