[CentOS] CPU Usage when idle

Jorge Fábregas jorge.fabregas at gmail.com
Thu Jan 12 01:42:34 UTC 2012

Hello guys,

Did anyone noticed how green CentOS 6 is compared to the previous
release?  I've been running a couple of "CentOS 6" VMs (on our vSphere
environment) for the last couple of weeks and noticed a BIG difference
when it comes to CPU usage when the VM is completely idle.   I would
like to share what I've seen in our environment:

PfSense 2.0 (FreeBSD) VM:	40 Mhz
CentOS 5.7  VM:			60 Mhz
CentOS 6.2  VM:			5 Mhz

This is really wonderful.  They did a great job with RHEL6 and I'm
curious what was changed in order to accomplish this.


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