sysstat

system performance tools for Linux

The sysstat package contains the following system performance tools:

  • sar: collects and reports system activity information;
  • iostat: reports CPU utilization and disk I/O statistics;
  • mpstat: reports global and per-processor statistics;
  • pidstat: reports statistics for Linux tasks (processes);
  • sadf: displays data collected by sar in various formats.

The statistics reported by sar deal with I/O transfer rates,

paging activity, process-related activities, interrupts,

network activity, memory and swap space utilization, CPU

utilization, kernel activities and TTY statistics, among

others. Both UP and SMP machines are fully supported.