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