Tomcat JMX CPU Usage Percentage

Question

I want to find out CPU usage ( in Percentage ) of an Apache Tomcat Server( 6.x ) using JMX .
There is an attribute ProcessCpuTime of MBean java.lang:OperatingSystem . But, how to calculate usage percentage from it?

Thanks.

Answer 1

Take the difference of two samples and divide by the time between samples.

To get a percentage, multiply by 100.

Answer 2

由于您可能希望随着时间的推移这样做，您可以使用http://jmxtrans.googlecode.com/等工具通过JMX查询Tomcat，然后使用Graphite进行图形化。