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Among HiveMQ’s hundreds of metrics is a group which offers detailed insights into the load the broker’s CPUs are experiencing.
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This pair of metrics measure the percentage of CPU time spent in kernel (system-level operations) and user space space (user-level processes). Kernel space includes the core operating system processes and device drivers. whereas user space includes application-level processes.
Prometheus queries
rate(com_hivemq_system_os_global_cpu_total_usage_iowait{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_irq{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_nice{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_softirq{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_steal{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_sys{job = "$job"}[1m])
rate(com_hivemq_system_os_global_cpu_total_usage_user{job = "$job"}[1m])
InfluxDB queries
SELECT mean("usage_user") + mean("usage_guest") + mean("usage_guest_nice") + mean("usage_iowait") + mean("usage_irq") + mean("usage_nice") + mean("usage_softirq") + mean("usage_steal") + mean("usage_system") FROM "cpu" WHERE $timeFilter GROUP BY time($shortInterval), "node" fill(null)