&quot;the JVM has excellent support for production logging and production monitoring, allowing you to easily monitor performance metrics down to an individual thread&quot;<p>Is it &quot;excellent&quot; compared to z&#x2F;OS and mainframe (SMF and RMF, specifically)? I sincerely doubt it, but I would like to know if there is someone who can compare. I don&#x27;t think any platform can match z&#x2F;OS in the visibility into the system, but I am not enough expert in Java to really compare.