The mem plugin collects memory metrics, defined as follows. For a more complete
explanation of the difference between used and actual_used RAM, see
Linux ate my ram.
- total: total physical memory available
- available: the actual amount of available memory that can be given instantly to processes that request more memory in bytes; In linux kernel 3.14+, this is available natively in /proc/meminfo. In other platforms, this is calculated by summing different memory values depending on the platform (e.g. free + buffers + cached on Linux). It is supposed to be used to monitor actual memory usage in a cross platform fashion.
- available_percent: Percent of memory available,
available / total * 100 - used: memory used, calculated differently depending on the platform and designed for informational purposes only.
- free: memory not being used at all (zeroed) that is readily available; note that this doesn't reflect the actual memory available (use 'available' instead).
- used_percent: the percentage usage calculated as
used / total * 100
Meta:
- units: bytes
- tags:
nil
Measurement names:
- mem_total
- mem_available
- mem_used
- mem_free
Meta:
- units: percent (out of 100)
- tags:
nil
Measurement names:
- mem_used_percent
- mem_available_percent