Garbage collector process in java

Courtesy : https://www.youtube.com/watch?v=UnaNQgzw4zY


Eden:
All new object

S1: one Eden is full, Minor CG , unrefrenced Eden objected are marked and sweep and later moved(compacted to S1)

So after one minor CG(Eden and S2 will be free)

S2: now when again eden is full, Minor GC kicks in this time on Eden and S1 space,
Unreference object from Eden and S1 are marked and

Serials: STOPS the work
Concurrent: Stops App only for mark step, doenst wait for Old generation to be full, after marking, it runs along with app, performing sweep and compact task

Parallel: uses multiple GC threads, but its stop the world/App, runs only after % of Old generation is full, it stops the app, but uses multple GC,

Best: CMS