Java GC CMS Collector Times

Question

We have enabled garbage collection logs for our application. I see some lines where it prints the time of some of the CMS steps. Can anyone explain or point me to some link which explains CMS logs like

9657.238: [CMS-concurrent-mark: 17.199/17.396 secs] [Times: user=80.61 sys=10.00, real=17.40 secs]

Answer 1

CMS and its phases are well explained at http://blog.griddynamics.com/2011/06/understanding-gc-pauses-in-jvm-hotspots_02.html.

For the times being printed, this is Unix process times, as pointed by Lithium you can read What do 'real', 'user' and 'sys' mean in the output of time(1)? for that.