Response time is measured in milliseconds usually. I see that this has been moved out of the current set of documentation and will work with the doc writers to get it back in. http://support.hyperic.com/display/EVO/Metric+Categories+and+Value+Types
Also, please refrain from repeat posting. You have another post asking the same thing but details on Tomcat:
I am working on Tomcat monitoring using HQ API.
I am monitoring "Thread count" and "thread count per min" metrics of Tomcat.
When I send 100 requests,there is change in values of these counters.
But the change in value is irrelevant.
I am not able to know whether this data is correct or not.
Please let me know if anybody knows the reason.
I am going to close that one and keep all discussion in the same thread. It would be helpful if you provided some examples of what you are seeing - this question doesn't give us much information to go on to help you determine possible routes for investigation. Are you using the Groovy API or the Web Services API (HQAPI)?