Library /sys$common/syshlp/sysgen.hlb SHARE, /INITIALIZE, Qualifiers, /POOLBSIZE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /POOLBSIZE=block-size

    Specifies the size of each block in the dynamic pool. The block-
    size value is an integer with a default of 128 bytes.