title: how to select and configure a JasperReports virtualizer?
body: <p>We're using virtualizers with JasperReports 3.7.0 to avoid running out of memory with some large queries. Found one <a href="http://itblackbelt.wordpress.com/2008/02/29/generating-huge-reports-in-jasperreports/" rel="nofollow noreferrer">helpful article</a> on this topic, and there's a brief description of virtualizers in The Ultimate Guide to JasperReports, but that's just a start. I'm trying to figure out which virtualizer is ideal, and having chosen one, how to tune the configuration parameters. Anyone out there have some wisdom to offer on this topic?</p>
  
  <p>Walter Gillett</p>