Hi there @Rajashekar, thanks for reporting this!!
I believe this thread is almost identical to this other one.
In short, currently, SonarQube for IDE will analyze (almost) all files that are reported as “open” by the IDE (regardless if they are actually open or simply open in the background by other extensions). Improvements to analysis performance is coming in the next version, and we are constantly working on further improvements.
We would need to rethink and refactor how analysis is triggered in SonarQube for IDE in order to prevent this. I cannot commit to any timeline for this for now.
I hope this helps, even though it’s not really a solution 
Best,
Sophio