The LISTCNTLTYPE parameter allows you to choose how storage use is to be managed for individual lists. You can limit either the number of list entries per list or the number of data elements per list. A limit on storage use per list may be needed to prevent the excessive use of storage by certain lists.

The flexibility offered by the choice of limits allows you to select the type of limit that best suits your use of the list structure. For instance, if your main concern is to limit the number of entries that might build up on a list, you should limit the number of list entries per list. If your main concern is to prevent the entries on a given list from consuming too much of the storage in the structure, you should limit the number of data elements per list.