VMS Help Sys Parameters, ACP_QUOCACHE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    ACP_QUOCACHE sets the number of quota file entries cached. A
    specification of 0 means no cache. Too small a value causes
    excessive XQP I/O operations, while too large a value causes
    excessive physical memory to be consumed by the quota caches.

    ACP_QUOCACHE is an AUTOGEN, DYNAMIC, and FEEDBACK parameter.