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