The atsar command can be used to detect
performance bottlenecks on Linux systems. It is
similar to the sar command on other UNIX
platforms. Atsar has the ability to show what is
happening on the system at a given moment. It also
keeps track of the past system load by maintaining
history files from which information can be
extracted. Statistics about the utilization of
CPUs, disks and disk partitions, memory and swap,
tty's, TCP/IP (v4/v6), NFS, and FTP/HTTP traffic
are gathered. Most of the functionality of atsar
has been incorporated in the atop project.
