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

    RESHASHTBL defines the number of entries in the lock management
    resource name hash table. Each entry requires 4 bytes. A typical
    tuning goal is to have the RESHASHTBL parameter about four times
    larger than the total number of resources in use on the system.
    Managers of systems with memory constraints or systems that are
    not critically dependent on locking speed could set the table to
    a smaller size.

    RESHASHTBL has the AUTOGEN, FEEDBACK, and MAJOR attributes.