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

    If the dump file is saved in the page file, SAVEDUMP specifies
    whether the page file is saved until the dump file is analyzed.
    The default value 0 specifies that the page file should not be
    retained. A value of 1 specifies that the dump written to the
    page file should be retained until either copied or released
    using the SDA utility.