On 10/1/2013 7:35 PM, Mark Eggers wrote: > You could take a look at sysstat and the graph with whatever tool you > wish. I use kSar to plot. > > By default, the sysstat output is kept for a week, but you could write > scripts to keep the information for as long as you wished. > > sysstat rpm on CentOS 6.4: sysstat-9.0.4-20.el6.x86_64 > kSar web site:http://sourceforge.net/projects/ksar/ you don't even need to write scripts, the sar data collector, sadc, can be configured to collect as little/much data as you want, for whatever interval and period you wish simply by tweaking a few configure file settings. See /etc/sysconfig/sysstat but, if you really want historical data going back months, I do think I'd look into something like cactii, which is built on RRDtool, which replaced the legacy mrtg. This will maintain a set of web pages with hourly/daily/weekly/monthly stats of as many parameters as you wish to track going back as far as you like. -- john r pierce 37N 122W somewhere on the middle of the left coast