APM System Metrics fields

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System status metrics, like CPU and memory usage, that are collected from the operating system.

system

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system contains local system metrics.

cpu

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cpu contains local CPU stats.

system.cpu.total.norm.pct

The percentage of CPU time spent by the process since the last event. This value is normalized by the number of CPU cores and it ranges from 0 to 100%.

type: scaled_float

format: percent

memory

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memory contains local memory stats.

system.memory.total

Total memory.

type: long

format: bytes

actual

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Actual memory used and free.

system.memory.actual.free

Actual free memory in bytes. It is calculated based on the OS. On Linux it consists of the free memory plus caches and buffers. On OSX it is a sum of free memory and the inactive memory. On Windows, it is equal to system.memory.free.

type: long

format: bytes

process

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process contains process metadata, CPU metrics, and memory metrics.

cpu

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cpu contains local CPU stats.

system.process.cpu.total.norm.pct

The percentage of CPU time spent by the process since the last event. This value is normalized by the number of CPU cores and it ranges from 0 to 100%.

type: scaled_float

format: percent

memory

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Memory-specific statistics per process.

system.process.memory.size

The total virtual memory the process has.

type: long

format: bytes

system.process.memory.rss.bytes

The Resident Set Size. The amount of memory the process occupied in main memory (RAM).

type: long

format: bytes