If the benefit for a given database is larger than {TAIL ~ the recorded benefit} in the shared memory, then the given database will replace the benefit data recorded in shared memory with its own benefit data , and that database then knows that it has {HEAD ~ the highest relative need} for memory in the data processing system 
If the benefit for a given database is larger than { TAIL ~ the recorded benefit } in the shared memory , then the given database will replace the benefit data recorded in shared memory with its own benefit data , and that database then knows that it has { HEAD ~ the highest relative need } for memory in the data processing system
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH