Absent information about hardware or settings , one can only make the most general of observations .
In my experience , the occasional micro-stutter is to be expected . However , one can gain a generally very smooth experience by a framerate cap , and adjusting settings to provide a decent amount of headroom over that level .
This works particularly well with 60hz monitors as you can check vsync in the DCS settings , and adjust settings as stated . You can also cap the framerate in Nvidea settings (and presumably AMD) or Rivatuner .
The basic idea is to lower settings to provide headroom over the frame-cap sufficient to allow ai , clouds , cities weapon firing etc .
I assume you are running on an ssd ?