Displays information about the granularity hint regions
    (GHR) that have been established. For each of these regions,
    information is displayed about the size of the region, the amount
    of free memory, the amount of memory in use, and the amount of
    memory released to OpenVMS from the region. The granularity hint
    regions information is also displayed as part of SHOW MEMORY and
    SHOW MEMORY/ALL commands.