o This command requires exclusive database access (the database cannot be open or accessed by other users). o Only one value can be supplied to the Rad_Hint qualifier. The indicated RAD must contain memory. o When shared memory is set to System (with Galaxy enabled) or to Resident, then the process that opens the database must be granted the VMS$MEM_RESIDENT_USER identifier. o For applications that can be partitioned into one or more RADs, the Rad_Hint qualifier allows additional control over exactly where memory for caches and global sections is allocated. This control can permit increased performance if all application processes run in the same RAD, and the database and row cache global sections also reside in that same RAD. o When Resident shared memory is specified, the global demand- zero pages are always resident in memory and are not backed up by any file on any disk. The pages are not placed into the process's working set list when the process maps to the global section and the virtual memory is referenced by the process. The pages are also not charged against the process's working set quota or against any page-file quota. o To save physical memory, Oracle Rdb generally attempts to create and use shared page tables when creating large resident global sections.