Spark 2.6.3 Memory usage

Spark Spark Support
1

Can anybody explain how does Spark use the system memory??

I opened the Task manager and checked, it was using 111,920KB of memory!!!

Then I minimized it, and the memory usage went down to 8,356K, and when I reopened it, it started climbing up, and after few minutes already reached 50MB!!!

And now, after 50 more seconds, it already reached 115.7MB!!!

It is crazy!

2

The Java Virtual Machine reserves already a lot space. I can’t speak of Spark (Java Swing), but in our JavaFX application, the JVM is also about 120 MB, while the actual Heap space of our app is only about 20 MB.