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CPU utilization is a key metric used to assess the performance of a computer system. It indicates how much of the CPU’s capacity is being used over a period of time. Monitoring this metric helps identify bottlenecks and optimize system performance.
Understanding CPU Utilization Metrics
Several metrics are used to measure CPU utilization, including user time, system time, idle time, and I/O wait time. These metrics provide insights into how the CPU resources are allocated during system operation.
Methods to Calculate CPU Utilization
One common method involves measuring the CPU time spent in different states over a specific interval. The formula for CPU utilization is:
CPU Utilization (%) = 100 – (Idle Time / Total Time) * 100
Tools for Monitoring CPU Usage
- top
- htop
- mpstat
- sar
These tools provide real-time data on CPU utilization and help system administrators identify performance issues quickly.