Hi,
       I met a problem about how to search many keywords  in about 5,000,000 
documents.For example the query may be like "(a1 or a2 or a3 ....a200) and (b1 
or b2 or b3 or b4 ..... b400)",I found it will take vey long time(40seconds) to 
get the the answer in only one field(Title field),and JVM will throw OutMemory 
error in more fields(title field plus content field).Any suggestions or good 
idea to solve this problem?thanks in advance.

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