Java G1 garbage collection in production

Question

Since Java 7 is going to use the new G1 garbage collection by default is Java going to be able to handle an order of magnitude larger heap without supposed \"devastating\" G

Answer 1

CMS can lead to slowly degraded performance even if you are running it without accumulating tenured objects. This is because of memory fragmentation which G1 supposedly avoids.

The myth about G1 available only with paid support is just that, a myth. Sun and now Oracle have clarified this on the JDK page.