Parallel GC

• Minor GC: Parallel
• Full GC
  • Mark: Single
  • Sweep: Single
  • Compact: Single

Parallel Old GC

• Minor GC: Parallel
• Full GC
  • Mark: Parallel
  • Sweep: Parallel
  • Compact: Parallel

CMS GC

• Minor GC
  • Single (default)
  • Parallel (-XX:+UseParNewGC 옵션 사용시)
• Full GC
  • Mark
    • Initial Mark: Single
    • Mark: Concurrent Parallel
    • Remark: Parallel
  • Sweep: Concurrent Pallel
  • Compact: Single

G1 GC

• Minor GC: Parallel
• Full GC
  • Initial Mark: Parallel
  • Root Region Scan: Concurrent Parallel
  • Concurrent Mark: Concurrent Parallel
  • Remark: Parallel
  • Cleanup: Parallel
  • Copy: Parallel