Different CPU times – Unix/Linux ‘top’

The article explores CPU consumption metrics in Unix/Linux systems, detailing eight metrics: User CPU time, System CPU time, nice CPU time, Idle CPU time, Waiting CPU time, Hardware Interrupt CPU time, Software Interrupt CPU time, and Stolen CPU time. Each metric highlights the CPU's time allocation for various processes, providing essential insights for performance optimization.

Steal CPU time – ‘st’ time in top

The article examines 'steal' or 'stolen' CPU time in cloud and virtualized environments, highlighting its significance when multiple virtual machines share CPU resources. It describes how high steal time indicates an overloaded physical host and outlines methods to monitor, simulate, and resolve high steal time issues, including upgrading instances and optimizing applications.

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