Does Java Garbage Collect always has to “Stop-the-World”?

Question

I am trying to understand Java\'s garbage collection more deeply.

In HotSpot JVM generational collection, in the heap, there are three areas (Young generation, Old gener

Answer 1

Stop-the-world will occur no matter which GC algorithm you choose. Stop-the-world means that the JVM is stopping the application from running to execute a GC. When stop-the-world occurs, every thread except for the threads needed for the GC will stop their tasks.