Lucidworks Solr Guide says that: "If you are using Sun's JVM, add the -server command-line option when you start Solr. This tells the JVM that it should optimize for a long running, server process. If the Java runtime on your system is a JRE, rather than a full JDK distribution (including javac and other development tools), then it is possible that it may not support the -server JVM option"
Does any folks using -server parameter? Also what parameters you are using to start up Solr? I mean parallel garbage collector vs.?