Guidelines for Selecting a GC

• If application performance is the most important factor and pause times over 1 second are acceptable

  • Let the VM choose the collector on its own

  • The VM will likely choose well on its own, but if you want to select manually, enable the XX:+UseParallelGC option

• If response time is more important than overall throughput and pause times must be under 1 second

  • Try using a Concurrent Collector

    • Enable the XX:+UseConcMarkSweepGC option or the XX:+UseG1GC option

• If performance is still insufficient

  • Try adjusting the heap size and generation sizes