In one implementation, once a given database has had calculated its corresponding memory benefit data, the database communicates the memory benefit data with {TAIL ~ other databases} in the data processing system through {HEAD ~ the use} of a shared memory  
In one implementation , once a given database has had calculated its corresponding memory benefit data , the database communicates the memory benefit data with { TAIL ~ other databases } in the data processing system through { HEAD ~ the use } of a shared memory
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH