We are using JMeter in a heterogeneous environment and we would like to measure CPU and memory while we are producing heavy load on a server where our service or web application
One you install the Perfmon plugin, I also had to install the server agent, and open the firewall port 4444.
Here's a link which I found super useful.
http://grosan.co.uk/web-application-performance-testing-using-apache-jmeter-part-2-monitor-server-resources/