atop

A new command, atopsar, has been added to generate
detailed system activity reports (similar to the
UNIX command sar) using the compressed logfiles as
written by atop. These reports can also be
generated for the current situation by specifying
an interval for atopsar on the command line.

Unformatted output can be produced to do further
processing via scripts. Steal-percentage and
disk-counters are supported for virtual machines.
The scripts for daily logging have been improved.
More than 65535 processes can be logged per
interval now. Standard disk I/O statistics per
process will be shown (in Linux kernel 2.6.20 and
higher).

A busy percentage is shown for each network-interface. Colors are used to indicate that a particular hardware resource has (almost) reached a critical busy percentage. The most critical resource is automatically determined to adapt the sorting order for active processes dynamically. Minor bugs were fixed.

This release added a new line with system-level
counters related to processor-utilization
(including load averages, context-switches, and
interrupts). The effective line speed in bits per
second was corrected for all network interfaces
(division by 1000 instead of 1024). User IDs and
group IDs are supported as numerical values now.

This release added a new line with system-level counters related to paging (including memory scans, swapin, and swapout). The effective line speed in bits per second is now shown for all network interfaces. The average utilization per second can also optionally be shown for most counters. The output was improved and is easier to parse due to a fixed number of values per line. The related kernel patch was ported to kernel version 2.6.16.