Internal

Overview

The percentage of total CPU time spent executing code in user mode.

Also see:

nice - time in USER_HZ units spent in user mode with low priority (nice).
system - time in USER_HZ units spent in system mode: kernel executing system calls on behalf of processes.
idle - time in USER_HZ units spent in idle mode. This value should be USER_HZ times the second entry in /proc/uptime.
iowait - time in USER_HZ units processes are 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.
irq - time in USER_HZ units spent servicing hardware interrupts.
softirq - time in USER_HZ units spent servicing softirqs.
steal - time in USER_HZ units spent in other operating systems when running in a virtualized environment.
guest - time in USER_HZ units spent running a virtual CPU for guest operating systems under the control of the Linux kernel. More details: Steal Time.
guest_nice - time in USER_HZ units spent running a niced guest (virtual CPU for guest operating systems under the control of the Linux kernel).

Memory

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