I've just begun running some tests on our application system using JMeter. We are currently running a three-server setup. Requests go to a load balancer, which sends it to one of two apache servers (Ubuntu). Each of those servers has a link to a single database server running MySQL.
Here is my question: As I run tests with 100 requests or so at a time, my two application code servers peak at about 35% CPU usage and my database sits calmly at 0.3%. What could be causing such a high usage on the application servers?
I'm BRAND new to server admin