Ps displays information about a selection of the active processes. The highlighted column shows CPU statistics us: reports the amount of time that the processor spends on userland tasks Example:ĭisplay two reports at an interval of two seconds vmstat 2 2 procs -memory-swap-io-system-cpu. In absence of count, when delay is defined, default is infinite.
The count value specifies the number of updates. If no delay is specified, only one report is printed with the average values since boot. The delay value specifies the delay between updates in seconds. Additional reports give information on a sampling period of length delay. The first report produced gives averages since the last reboot. Vmstat reports information about processes, memory, paging, block IO, traps, disks and CPUĪctivity. To display two CPU utilization reports at an interval of 2 seconds iostat -c 2 2 Linux 4.13.0-45-generic () _x86_64_ (4 CPU)Īvg-cpu: %user %nice %system %iowait %steal %idle If -y option is used, it will omit the first report and each subsequent report covers the time since the previous report. When run with options, the first report generated provides statistics since the system was booted. If the interval parameter is specified without the count parameter, the iostat command generates reports continuously one after the other at a specified interval. The count parameter value if specified, determines the number of reports generated at interval seconds apart. The interval parameter specifies the amount of time in seconds between each report. The iostat command is used to report the CPU statistics as well as input/output statistics for devices and partitions since last system boot (run without options).
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