What do these OK/KO show in simulation summary

In the following summary what are the (OK= and KO=) indicating for example

max response time 5808 (OK=5808 KO=408 )
So the max response time seen is 5808ms but what do the values of OK and KO show?

max response time:

  • overall 5808 ms
  • only successful requests 5808 ms
  • only failed requests 408 ms