[CentOS] Historical Data related to CPU,IO and Memory

From: Kaushal Shriyan <kaushalshriyan at gmail.com>

> Are there any utilities or tools to look at historical data of Memory, CPU
> Utilization or IO activity on CentOS 6.4 or 5.9 Version? For example the
> how much the memory was consumed for the period of last six months.

The most lightweight, if you do not mind scripting a little bit, would be 
a "simple" cron script calling rrdtool.
You can find many rrdtool examples online.

JD