A note on logs:

The /var/log/atop/atop.log file is rotated by logrotate.

The other, date-stamped logfiles, cannot be correctly handled by logrotate.  
Since upstream doesn't provide a method for pruning these, I'm not attempting to do so in the 
default configuration of the RPM.  If you need to do so, use something like this:

find /var/log/atop/atop_* -mtime +5 -exec rm {} \;

This would remove anything older than 5 days, and could be placed in a cron job, etc.

-Jon Ciesla
2012-05-11