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Types of Garbage Collectors in Java

A reference to Java garbage collectors and their approaches to throughput, pauses, and memory.

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  1. Serial GC: Single-threaded, stop-the-world collector for small apps or single-core systems.
  2. Parallel GC: Multi-threaded, throughput-focused collector with stop-the-world pauses.
  3. Concurrent Mark-Sweep (CMS) GC: Mostly concurrent, low-latency collector, deprecated due to fragmentation.
  4. G1 (Garbage-First) GC: Region-based, balances throughput and pause time, default since Java 9.
  5. Z Garbage Collector (ZGC): Low-latency, concurrent GC for large heaps with minimal pauses.
  6. Shenandoah GC: Low-latency, concurrent compaction for consistent response times.
  7. Epsilon GC: No-op GC for testing or short-lived apps, no memory reclamation.

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