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Node Compatibility Notes

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.

CPU Metrics

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.