title: Solr: Number of posted files does not equal maxDoc
body: <p>I apologize in advance if this question has already been answered somewhere - I wasn't able to find it.</p>
  
  <p>I'm relatively new to Solr, and have been following the instructions given by the <a href="http://lucene.apache.org/solr/4_1_0/tutorial.html" rel="nofollow">tutorial</a> for using the default SimplePostTool to index my data from the command line.  I'm currently using Solr 4.0 in my testing.</p>
  
  <p>First, I delete everything in my index by query.  Then I point the SimplePostTool to several directories and index tens of thousands of files.  In my case, for right now, each XML file is a separate document. Some of the documents may have the same uniqueKey ID.  If it matters, the XML document sizes range from 4-60kB.</p>
  
  <p>SimplePostTool returns when it's finished and says 26,541 files were indexed.  Then I look in the Admin collection1 page and see Num Docs = 20,985 and Max Doc = 22,921.</p>
  
  <p>I've seen <a href="http://lucene.472066.n3.nabble.com/numDocs-and-maxDoc-td484902.html" rel="nofollow">other posts</a> discussing the discrepancy between Num Docs and Max Doc (I feel I understand that overwrite behavior sufficiently).  My question is why the number of indexed docs reported by SimplePostTool does not match Max Doc given by the Solr Admin page?</p>