we use the the following in production java -server -XX:+UseParallelGC -XX:+AggressiveOpts -XX:+DisableExplicitGC -Xms3G -Xmx40G -Djetty.port=<your-port> -Dsolr.solr.home=<your-solr-home> jar start.jar
more information http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html Johannes
