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