This document details issues specific to certain versions of node in regards to the native metrics module. It is a living document to be updated as new problems are found.
Our native module relies on the function uv_getrusage to measure CPU usage.
This function was added to libuv in version 0.11.20 which was
incorporated into Node in version 0.11.12. As of the time of
this writing, both CPU measurements and loop timing require this function and
thus cannot be supported on earlier node versions.