I am doing sorting on DateTime with minute resolution. I am having 90 million 
of records and sorting is consuming nearly 500 MB. 30% records are not part of 
primary result set and they don't have sort field. But field cache memory (4 * 
IndexReader.maxDoc() * (# of different fields actually used to sort)) is 
consumed eventhough 30% of records are not part of sort.

I want to avoid the 30% of records not to be loaded in field cache. How could i 
achieve this. Any idea are greatly appreciated?

Regards
Ganesh
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