Events OS Metrics

Internal

• DataBot Metric Reference

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.

Also see:

• /proc/stat cpu user time reading
• GitHub CpuUserTime

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.

Also see:

• /proc/stat cpu nice time reading
• GitHub CpuNiceTime

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.

Also see:

• /proc/stat cpu system time reading
• GitHub CpuKernelTime

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.

Also see:

• /proc/stat cpu idle time reading
• GitHub CpuIdleTime

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.

Also see:

• /proc/stat cpu iowait time reading
• GitHub CpuIoWaitTime

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.

Also see:

• /proc/stat cpu irq time reading
• GitHub CpuHardwareInterruptTime

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.

Also see:

• /proc/stat cpu softirq time reading
• GitHub CpuSoftwareInterruptTime

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.

Also see:

• /proc/stat cpu steal time reading
• GitHub CpuStolenTime

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.

Also see:

• /proc/stat cpu guest time reading

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.

Also see:

• /proc/stat cpu guest_nice time reading

Memory Metrics

PhysicalMemoryFree

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

Also see:

• /proc/meminfo MemFree
• GitHub PhysicalMemoryFree

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.

Also see:

• /proc/meminfo MemTotal
• GitHub PhysicalMemoryTotal

PhysicalMemoryUsed

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

Used Physical Memory = MemTotal - MemFree - Buffers - Cached

Also see:

• /proc/meminfo physical memory used by processes
• GitHub PhysicalMemoryUsed

Swap Metrics

SwapFree

The total amount of free swap.

Also see:

• /proc/meminfo SwapFree
• GitHub SwapFree

SwapTotal

The total amount of swap available.

Also see:

• /proc/meminfo SwapTotal
• GitHub SwapTotal

SwapUsed

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

Used Swap = SwapTotal - SwapFree

Also see:

• /proc/meminfo total amount of used swap
• GitHub SwapUsed

Load Average Metrics

LoadAverageLastMinute

Also see:

• GitHub LoadAverageLastMinute

LoadAverageLastFiveMinutes

Also see:

• GitHub LoadAverageLastFiveMinutes

LoadAverageLastTenMinutes

Also see:

• GitHub LoadAverageLastTenMinutes