Steal only applies to virtual machines, not dedicated servers. Time spent servicing software interrupt routines. Time spent servicing hardware interrupt routines. Time spent on waiting on IO peripherals, usually disk. The default value is 0, and it ranges from 19 down to -20. This is a subset of the “user” state and shows the CPU time used by processes that have a positive niceness (those with a lower priority than other tasks).
Sustained high usage may indicate a device driver issue. This can spike when data is being read or written to disk. The kernel is responsible for low-level tasks that take care of your general day-to-day server processes, e.g. This shows the amount of CPU time used by the kernel. This is going to be the biggest user of CPU.
These are your application-level processes, such as MySQL. This is the CPU time used by userspace processes. The following is a quick explanation of what each of these values means.
Sustained high CPU usage is something that requires further attention. The higher your %Cpu, the busier your system is, and this will affect the performance of your websites.īursts of high usage are normal and nothing to be concerned about. Real-time CPU usage is broken down into categoriesĬPU usage is the primary metric we’re interested in.
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