title: Single word lucene indexing limit?
body: <p>I've a Lucene based application and obviously a problem. 
  When the number of indexed document is low no problems appear. When then number of documents increase, seems that no single word are indexing. What we obtain is that searching with single word (single term) is an empty set.
  The version of Lucene is 3.1 on 64 bit machine and the index is 10GB.</p>
  
  <p>Do you have any idea?</p>
  
  <p>Thanks</p>