Events OS Metrics

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Internal

Overview

CPU Metrics

CpuUserTime

The percentage of total CPU time spent executing code in user mode. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuNiceTime

The percentage of total CPU time spent executing code in user mode with low priority (nice). By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuSystemTime

The percentage of total CPU time spent executing system calls on behalf of processes. The metric was used to be named "CpuKernelTime", but the name was deprecated. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuIdleTime

The percentage of total CPU time spent in idle mode. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuIoWaitTime

The percentage of total CPU time spent waiting for I/O to complete. The CPU will not wait for IO, it will be schedule onto another task or will enter idle state. When a CPU goes into idle state for outstanding task I/O, another task will be scheduled on this CPU. On a multi-core CPU, the task waiting for I/O to complete is not running on any CPU, so the iowait of each CPU is difficult to calculate. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuHardwareInterruptTime

The percentage of total CPU time spent servicing hardware interrupts. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuSoftwareInterruptTime

The percentage of total CPU time spent servicing software interrupts. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuStolenTime

The percentage of total CPU time spent in other operating systems when running in a virtualized environment. More details:
Steal Time
. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuGuestTime

The percentage of total CPU time spent running a virtual CPU for guest operating systems under the control of the Linux kernel. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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CpuGuestNiceTime

The percentage of total CPU time spent running a virtual CPU for niced guest operating systems under the control of the Linux kernel. By default, this metric is calculated based on subsequent values read from/proc/stat during two subsequent collections. It is also possible to get the value from the top command output, but this has to be configured explicitly.

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Memory Metrics

PhysicalMemoryFree

The amount of physical RAM, left unused by the system.

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PhysicalMemoryTotal

Total amount of usable RAM, which is the amount of physical RAM installed on the system minus a number of reserved bits and the kernel binary code.

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PhysicalMemoryUsed

The amount of physical memory used by processes. It is calculated with the formula:

Used Physical Memory = MemTotal - MemFree - Buffers - Cached

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Swap Metrics

SwapFree

The total amount of free swap.

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SwapTotal

The total amount of swap available.

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SwapUsed

The amount of swap used by processes can be approximated with the formula:

Used Swap = SwapTotal - SwapFree

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Load Average Metrics

LoadAverageLastMinute

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LoadAverageLastFiveMinutes

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LoadAverageLastTenMinutes

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