The value of tmnxBsxIsaAaGrpToSubWaSBfLoWmk specifies the
low watermark for the weighted average utilization of the shared
buffer space in the 'ToSub' buffer pool. When a buffer pool is in
an overloaded state and the wa-shared buffer utilization
for an ISA is less than or equal to tmnxBsxIsaAaGrpToSubWaSBfLoWmk the
ISA 'ToSub' buffer pool leaves the overload state and a notification
tmnxBsxIsaAaGrpToSbWaSBufOvldClr is sent to indicate the
overload state has cleared.
The value of tmnxBsxIsaAaGrpToSubWaSBfLoWmk must be less than
tmnxBsxIsaAaGrpToSubWaSBfHiWmk.