sun.misc.Perf documentation or alternative

Question

I understand that the sun.* packages are not part of the official Java API. However, I need to use some functionality similar to what Perf offers:

Answer 1

There are wrapper around JVM perfcounters in jvm-attach library, though documentation is not any better (i.e. it is absent).

jvm-attach library itself is a wrapper around JVM diagnostic interfaces including heap dumps, JMX etc