G1 balances pause and throughput for most services. For latency-sensitive apps with large heaps, ZGC or Shenandoah keep pauses sub-millisecond. Parallel GC maximizes throughput for batch jobs where pauses don't matter. Measure with GC logs before switching.

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Interview Tip

Match GC to the workload; measure with GC logs.

jvmgctuning

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