
Metric 'memory.usage' depends on balloon driver, and shows the memory usage inside guest-os, while 'memory.resident' represents volume of RAM used by the instance on the physical machine So, it is more reasonable to use 'memory.resident' when calculating node utilization by gathering instances utilization of the node. Change-Id: I12dff5176bcf6cb103aa44cafd54f9ecd7170864
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Watcher
OpenStack Watcher provides a flexible and scalable resource optimization service for multi-tenant OpenStack-based clouds. Watcher provides a robust framework to realize a wide range of cloud optimization goals, including the reduction of data center operating costs, increased system performance via intelligent virtual machine migration, increased energy efficiency-and more!
- Free software: Apache license
- Wiki: https://wiki.openstack.org/wiki/Watcher
- Source: https://github.com/openstack/watcher
- Bugs: https://bugs.launchpad.net/watcher
- Documentation: https://docs.openstack.org/watcher/latest/
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