Check_MK Werk 0925: ps: improved/fixed calculation of CPU utilization

ID: 0925 Title: ps: improved/fixed calculation of CPU utilization Component: Checks & Agents Level: 2 Class: New Feature Version: 1.2.5i3 Previously, the CPU utilization value was taken from the output <tt>pcpu</tt> from the ps command. This value didn't reflect the exact utilization since the last check because its definition is <br> <pre> CPU usage is currently expressed as the percentage of time spent running during the entire lifetime of a process. This is not ideal, and it does not conform to the standards that ps otherwise conforms to. CPU usage is unlikely to add up to exactly 100%. </pre> The evaluation of the <tt>pcpu</tt> field has been removed and got replaced by the field <tt>cputime</tt>, which reflects the number of cpu seconds since program start. With the <tt>cputime</tt> we are able to determine the correct value. To utilize this new calculation method, you need to update the check_mk_agent on the target host. The ps check itself is able to handle both formats, <tt>pcpu</tt> and <tt>cputime</tt>.