Host metrics

Hosts

Number of hosts returned by your search criteria.

Field Calculation: count(system.cpu.cores)

CPU Usage (%)

Percentage of CPU time spent in states other than Idle and IOWait, normalized by the number of CPU cores. This includes both time spent on user space and kernel space.

100% means all CPUs of the host are busy.

Field Calculation: (average(system.cpu.user.pct) + average(system.cpu.system.pct)) / max(system.cpu.cores)

CPU Usage - iowait (%)

The percentage of CPU time spent in wait (on disk).

Field Calculation: average(system.cpu.iowait.pct) / max(system.cpu.cores)

CPU Usage - irq (%)

The percentage of CPU time spent servicing and handling hardware interrupts.

Field Calculation: average(system.cpu.irq.pct) / max(system.cpu.cores)

CPU Usage - nice (%)

The percentage of CPU time spent on low-priority processes.

Field Calculation: average(system.cpu.nice.pct) / max(system.cpu.cores)

CPU Usage - softirq (%)

The percentage of CPU time spent servicing and handling software interrupts.

Field Calculation: average(system.cpu.softirq.pct) / max(system.cpu.cores)

CPU Usage - steal (%)

The percentage of CPU time spent in involuntary wait by the virtual CPU while the hypervisor was servicing another processor. Available only on Unix.

Field Calculation: average(system.cpu.steal.pct) / max(system.cpu.cores)

CPU Usage - system (%)

The percentage of CPU time spent in kernel space.

Field Calculation: average(system.cpu.system.pct) / max(system.cpu.cores)

CPU Usage - user (%)

The percentage of CPU time spent in user space. On multi-core systems, you can have percentages that are greater than 100%. For example, if 3 cores are at 60% use, then the system.cpu.user.pct will be 180%.

Field Calculation: average(system.cpu.user.pct) / max(system.cpu.cores)

Load (1m)

1 minute load average.

Load average gives an indication of the number of threads that are runnable (either busy running on CPU, waiting to run, or waiting for a blocking IO operation to complete).

Field Calculation: average(system.load.1)

Load (5m)

5 minute load average.

Load average gives an indication of the number of threads that are runnable (either busy running on CPU, waiting to run, or waiting for a blocking IO operation to complete).

Field Calculation: average(system.load.5)

Load (15m)

15 minute load average.

Load average gives an indication of the number of threads that are runnable (either busy running on CPU, waiting to run, or waiting for a blocking IO operation to complete).

Field Calculation: average(system.load.15)

Normalized Load

1 minute load average normalized by the number of CPU cores.

Load average gives an indication of the number of threads that are runnable (either busy running on CPU, waiting to run, or waiting for a blocking IO operation to complete).

100% means the 1 minute load average is equal to the number of CPU cores of the host.

Taking the example of a 32 CPU cores host, if the 1 minute load average is 32, the value reported here is 100%. If the 1 minute load average is 48, the value reported here is 150%.

Field Calculation: average(system.load.1) / max(system.load.cores)

Memory Cache

Memory (page) cache.

Field Calculation: average(system.memory.used.bytes ) - average(system.memory.actual.used.bytes)

Memory Free

Total available memory.

Field Calculation: max(system.memory.total) - average(system.memory.actual.used.bytes)

Memory Free (excluding cache)

Total available memory excluding the page cache.

Field Calculation: system.memory.free

Memory Total

Total memory capacity.

Field Calculation: avg(system.memory.total)

Memory Usage (%)

Percentage of main memory usage excluding page cache.

This includes resident memory for all processes plus memory used by the kernel structures and code apart from the page cache.

A high level indicates a situation of memory saturation for the host. For example, 100% means the main memory is entirely filled with memory that can’t be reclaimed, except by swapping out.

Field Calculation: average(system.memory.actual.used.pct)

Memory Used

Main memory usage excluding page cache.

Field Calculation: average(system.memory.actual.used.bytes)

Log Rate

Derivative of the cumulative sum of the document count scaled to a 1 second rate. This metric relies on the same indices as the logs.

Field Calculation: cumulative_sum(doc_count)

Network Inbound (RX)

Number of bytes that have been received per second on the public interfaces of the hosts.

Field Calculation: average(host.network.ingress.bytes) * 8 / (max(metricset.period, kql='host.network.ingress.bytes: *') / 1000)

Network Inbound (TX)

Number of bytes that have been sent per second on the public interfaces of the hosts.

Field Calculation: average(host.network.egress.bytes) * 8 / (max(metricset.period, kql='host.network.egress.bytes: *') / 1000)

Disk Latency

Time spent to service disk requests.

Field Calculation: average(system.diskio.read.time + system.diskio.write.time) / (system.diskio.read.count + system.diskio.write.count)

Disk Read IOPS

Average count of read operations from the device per second.

Field Calculation: counter_rate(max(system.diskio.read.count), kql='system.diskio.read.count: *')

Disk Read Throughput

Average number of bytes read from the device per second.

Field Calculation: counter_rate(max(system.diskio.read.bytes), kql='system.diskio.read.bytes: *')

Disk Usage - Available (%)

Percentage of disk space available.

Field Calculation: 1-average(system.filesystem.used.pct)

Disk Usage - Max (%)

Percentage of disk space used. A high percentage indicates that a partition on a disk is running out of space.

Field Calculation: max(system.filesystem.used.pct)

Disk Write IOPS

Average count of write operations from the device per second.

Field Calculation: counter_rate(max(system.diskio.write.count), kql='system.diskio.write.count: *')

Disk Write Throughput

Average number of bytes written from the device per second.

Field Calculation: counter_rate(max(system.diskio.write.bytes), kql='system.diskio.write.bytes: *')