title: Solr query time increaes after machine reboot
body: <p>I have a 2.2GB solr core which responds extremely well after running the indexing process via DataImportHandler. I noticed that solr uses a considerable amount of ram while doing that. </p>
  
  <p>The problem comes after I reboot the machine. Query time increases to 200 - 300ms and used ram is very low. </p>
  
  <p>So can you please give me a hint on what can I try to reach the same perfomance I have after indexing even after machine reboot?</p>
  
  <p>Thank you! </p>