Metric plugins - mackerel-plugin-multicore

Mackerel-plugin-multicore is a plugin for monitoring multi-core CPUs. In the system metrics, the cpu value is the sum of all cores. In contrast, this plugin posts usage per core as a metric.

Monitorable metrics
- MultiCore CPU
- MultiCore loadavg5 per core
Configurable options
Example configuration
Repository

Monitorable metrics

MultiCore CPU

Metric Display Name	Metric Name	Stacked	Description
user	custom.multicore.cpu.#.user	✓	Time spent in user mode
nice	custom.multicore.cpu.#.nice	✓	Time spent in user mode with low priority (nice)
system	custom.multicore.cpu.#.system	✓	Time spent in system mode
idle	custom.multicore.cpu.#.idle	✓	Time spent in the idle task
iowait	custom.multicore.cpu.#.iowait	✓	Time waiting for I/O to complete
irq	custom.multicore.cpu.#.irq	✓	Time spent processing interrupts
softirq	custom.multicore.cpu.#.softirq	✓	Time spent processing softirqs
steal	custom.multicore.cpu.#.steal	✓	In a virtualized environment, time when the guest OS is not allocated CPU by the host OS or hypervisor
guest	custom.multicore.cpu.#.guest	✓	Time used by the virtual CPU of the guest OS
guestNice	custom.multicore.cpu.#.guestNice	✓	Time used by the virtual CPU of the niced guest OS

Post each value of cpu0 etc. in /proc/stat. # is replaced by cpu0, etc.

MultiCore loadavg5 per core

Metric Display Name	Metric Name	Diff	Stacked	Description
loadavg5	custom.multicore.loadavg_per_core.loadavg5			The value of `loadavg5` divided by the number of CPU cores

Post the value of loadavg5 in /proc/loadavg.

Configurable options

Option	Short	Description	Default
--tempfile		Specify the destination file path for tempfile
--help	-h	Show Help

The tempfile records the latest execution results
By default, it is created under /var/tmp/mackerel-agent/ as mackerel-plugin-multicore

Example configuration

[plugin.metrics.multicore]
command = ["mackerel-plugin-multicore"]

Repository

https://github.com/mackerelio/mackerel-agent-plugins/tree/master/mackerel-plugin-multicore