ATG Repository Item Cache Interesting

While analyzing repository item cache related issues. I found interesting point about item cache size configuration in the case of item descriptor inheritance. 

Link :
http://docs.oracle.com/cd/E26180_01/Platform.94/RepositoryGuide/html/s1010cacheconfiguration01.html

How item cache size works : It is the maximum number of items of this type to store in the item cache. When this maximum is exceeded, the oldest items are removed from the cache.

Here is the fact : Within an inheritance tree, the last-read item descriptor’s item-cache-size setting applies to all item descriptors within the inheritance tree. In order to ensure the desired item cache size, be sure to assign the same item-cache-size to all related item descriptors 

Default Item Cache Value : 1000