title: How to reduce the size of a generated Lucene/Solr index?
body: <p>I am working on a prototype of a search system. </p>
  
  <p>I have a table in oracle with some fields. I generated data that looks real. Around 300.000 rows.
  For example:</p>
  
  <pre>
  PaymentNo|Datetime        |AmountEuro|PayersName            |PayersPhoneNo|ReceiversLegal|ReceiversAcc
  2314     |2015-07-21T15:14|15.63     |Clinton, Barack Anjela|1.918.0060657|Nasa          |5555569778664190000
  230338   |2015-08-01T15:14|34.87     |Merkel, George Donald |1.653.0060658|PepsiCo       |7777828443194736000
  </pre>
  
  <p>( actually there are more columns)</p>
  
  <p>The size of table in oracle 62 MB (Toad reports)</p>
  
  <p>I imported table into Solr 5.2.1 (in Windows).
  The size of index with data is 88 MB (on disk).
  The size of index without data is 67 MB.</p>
  
  <p>My question is: Can I decrease the size of index?</p>
  
  <p>These options are already tested:
  Decreasing the amount of indexed table columns. Switching off data storage in Solr. Excluding some part of rows from index.</p>
  
  <p>I need an extra opportunity to decrease a size of an index.
  Do you know any? </p>