VMS Help INSTALL, LIST, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You can use the LIST command with the /FULL qualifier to display
    information that is useful in tuning the known image database.
    For example, a high entry-access count for an image may indicate
    that system performance could benefit if the image were installed
    /OPEN. Similarly, high entry-access counts for an image may
    indicate that installing the image /SHARED-that is, with global
    sections-could improve performance. For a description of global
    sections and global pages, including information about how to
    estimate the size of installed images, refer to the OpenVMS
    System Services Reference Manual.