В Red Hat Enterprise, CentOS, Fedora и других Linux системах есть замечательный пакет sysstat
# yum info sysstat
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Installed Packages
Name : sysstat
Arch : x86_64
Version : 7.0.2
Release : 12.el5
Size : 418 k
Repo : installed
Summary : The sar and iostat system monitoring commands.
URL : http://perso.orange.fr/sebastien.godard/
License : GPL
Description: This package provides the sar and iostat commands for Linux. Sar and
: iostat enable system monitoring of disk, network, and other IO
: activity.
В его состав входит утилита iostat — Report Central Processing Unit (CPU) statistics and input/output statistics for devices and partitions.
Пример использования:
# iostat -dh
-d — The -d option is exclusive of the -c option and displays only the device utilization report.
-h — Display the NFS report more human readable.
Все опции можно посмотреть в man iostat