title: what exactly is cumulative CPU time
body: <p>While working with a tomcat process in Linux we observed that the time field shows 
  5506:34 ( cumulative CPU time ) . While exploring this is the CPU percentage of time spent running during the entire lifetime of a process.</p>
  
  <p>Since this is a Java process we also observed that memory was almost full and needed a restart. </p>
  
  <p>My Question is what exactly is this Cumulative CPU time. Why does this specific process taking more CPU time when there are other process too ? </p>