There are a large number of different options that Solr gives you for enhancing the performance of a specific Solr instance, and for most of these options, deciding to modify them depends on the specific performance result you are trying to tune for. This section is structured from the most generally useful optimizations to more specific optimizations.
Solr runs inside a Java Virtual Machine (JVM), an environment that abstracts your Java-based application from the underlying operating system. JVM performance improves with every release, so use the latest version. There are many different parameters that you can tune the JVM for. However, most of them are "black magic", and changing them from the defaults can quickly cause problems if you don't know what you're doing. Additionally, the folks who write the JVMs spend a lot of time coming up with sophisticated algorithms that mean the JVM will usually...