[Personality]: Jon Masamitsu (GC)

Блог Jon Masamitsu содержит просто огромное количество информации по GC в HotSpot.

Например тут он рассказывает про допустимые комбинации коллекторов в Young и Old поколениях:
"
- UseSerialGC is "Serial" + "Serial Old"
- UseParNewGC is "ParNew" + "Serial Old"
- UseConcMarkSweepGC is "ParNew" + "CMS" + "Serial Old". "CMS" is used most of the time to collect the tenured generation. "Serial Old" is used when a concurrent mode failure occurs.
- UseParallelGC is "Parallel Scavenge" + "Serial Old"
- UseParallelOldGC is "Parallel Scavenge" + "Parallel Old""