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What does "Load" mean in the Host Metrics screen?


What is the definition of "Load " in the context of the Host Metrics page in Ambari? And how is it calculated?


Expert Contributor

Ambari Metrics Service uses psutil library to collect host metrics. The metrics's explanation can be found here -

The Load graph contains the metrics for 1-minute / 5minute and 15minute Load average on the host.

For more information, from the psutil docs,

  • Q: What about load average?
  • A: psutil does not expose any load average function as it’s already available in python as os.getloadavg