There are a lot of exciting new features including a number of GC improvements.
- The balanced GC policy, which I've mentioned before, is included in all 64-bit Java 7 JDKs. You can enable it with -Xgcpolicy:balanced.
- The soft-realtime garbage collector is included for evaluation on Linux and AIX. It can be enabled with -Xgcpolicy:metronome.
- The verbose GC format has been completely overhauled. It now provides more information and the XML format has been redesigned to make machine interpretation of the data simpler, allowing both IBM and customers to write tools to process and analyse the data.