Yes the query will constantly run to examine what processes are running, why at particular time a particular stp was running slow OR if there was any blocking session then which query was blocking OR wait types which can be avoided OR as i had mentioned why query timeout occurred when executing one stp, which usually it works properly especially when that stp has only INSERT statement. 

Just like how wireshark tracks all the messages on the wire through which we can know where is the contention or if packet is getting dropped, on similar basis we want something that can track the processes

Hope i was able to elaborate and clear what we require

Regards,
Saumik Vora